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* net: stmmac: dwmac-rk: add pd_gmac support for rk3399David Wu2016-09-021-0/+9
| | | | | | | | | Add the gmac power domain support for rk3399, in order to save more power consumption. Signed-off-by: David Wu <david.wu@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: stmmac: dwmac-rk: fixes the gmac resume after PD on/offRoger Chen2016-09-021-9/+10
| | | | | | | | | | GMAC Power Domain(PD) will be disabled during suspend. That will causes GRF registers reset. So corresponding GRF registers for GMAC must be setup again. Signed-off-by: Roger Chen <roger.chen@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: stmmac: dwmac-rk: add rk3366 & rk3399 specific dataRoger Chen2016-09-021-0/+226
| | | | | | | | | | | Add constants and callback functions for the dwmac on rk3228/rk3229 socs. As can be seen, the base structure is the same, only registers and the bits in them moved slightly. Signed-off-by: Roger Chen <roger.chen@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* mISDN: mark symbols static where possibleBaoyou Xie2016-09-014-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | We get a few warnings when building kernel with W=1: drivers/isdn/hardware/mISDN/hfcmulti.c:568:1: warning: no previous declaration for 'enablepcibridge' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:574:1: warning: no previous declaration for 'disablepcibridge' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:580:1: warning: no previous declaration for 'readpcibridge' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:608:1: warning: no previous declaration for 'writepcibridge' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:638:1: warning: no previous declaration for 'cpld_set_reg' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:645:1: warning: no previous declaration for 'cpld_write_reg' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:657:1: warning: no previous declaration for 'cpld_read_reg' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:674:1: warning: no previous declaration for 'vpm_write_address' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:681:1: warning: no previous declaration for 'vpm_read_address' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:695:1: warning: no previous declaration for 'vpm_in' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:716:1: warning: no previous declaration for 'vpm_out' [-Wmissing-declarations] drivers/isdn/hardware/mISDN/hfcmulti.c:1028:1: warning: no previous declaration for 'plxsd_checksync' [-Wmissing-declarations] .... In fact, these functions are only used in the file in which they are declared and don't need a declaration, but can be made static. so this patch marks these functions with 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: emac: emac gigabit ethernet controller driverTimur Tabi2016-09-0111-0/+3857
| | | | | | | | | | | | | | | | | | Add support for the Qualcomm Technologies, Inc. EMAC gigabit Ethernet controller. This driver supports the following features: 1) Checksum offload. 2) Interrupt coalescing support. 3) SGMII phy. 4) phylib interface for external phy Based on original work by Niranjana Vishwanathapura <nvishwan@codeaurora.org> Gilad Avidov <gavidov@codeaurora.org> Signed-off-by: Timur Tabi <timur@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: dsa: remove ds_to_privVivien Didelot2016-09-014-60/+60
| | | | | | | | Access the priv member of the dsa_switch structure directly, instead of having an unnecessary helper. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* rtnetlink: fdb dump: optimize by saving last interface markersRoopa Prabhu2016-09-012-11/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fdb dumps spanning multiple skb's currently restart from the first interface again for every skb. This results in unnecessary iterations on the already visited interfaces and their fdb entries. In large scale setups, we have seen this to slow down fdb dumps considerably. On a system with 30k macs we see fdb dumps spanning across more than 300 skbs. To fix the problem, this patch replaces the existing single fdb marker with three markers: netdev hash entries, netdevs and fdb index to continue where we left off instead of restarting from the first netdev. This is consistent with link dumps. In the process of fixing the performance issue, this patch also re-implements fix done by commit 472681d57a5d ("net: ndo_fdb_dump should report -EMSGSIZE to rtnl_fdb_dump") (with an internal fix from Wilson Kok) in the following ways: - change ndo_fdb_dump handlers to return error code instead of the last fdb index - use cb->args strictly for dump frag markers and not error codes. This is consistent with other dump functions. Below results were taken on a system with 1000 netdevs and 35085 fdb entries: before patch: $time bridge fdb show | wc -l 15065 real 1m11.791s user 0m0.070s sys 1m8.395s (existing code does not return all macs) after patch: $time bridge fdb show | wc -l 35085 real 0m2.017s user 0m0.113s sys 0m1.942s Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pegasus: Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar2016-09-011-1/+2
| | | | | | | | | | | | | | | | | | The workqueue "pegasus_workqueue" queues a single work item per pegasus instance and hence it doesn't require execution ordering. Hence, alloc_workqueue has been used to replace the deprecated create_singlethread_workqueue instance. The WQ_MEM_RECLAIM flag has been set to ensure forward progress under memory pressure since it's a network driver. Since there are fixed number of work items, explicit concurrency limit is unnecessary here. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Petko Manolov <petkan@mip-labs.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* bonding: Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar2016-09-011-1/+1
| | | | | | | | | | | | | | | | | | | alloc_ordered_workqueue() with WQ_MEM_RECLAIM set, replaces deprecated create_singlethread_workqueue(). This is the identity conversion. The workqueue "wq" queues multiple work items viz &bond->mcast_work, &nnw->work, &bond->mii_work, &bond->arp_work, &bond->alb_work, &bond->mii_work, &bond->ad_work, &bond->slave_arr_work which require strict execution ordering. Hence, an ordered dedicated workqueue has been used. Since, it is a network driver, WQ_MEM_RECLAIM has been set to ensure forward progress under memory pressure. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* sky2: use napi_complete_donestephen hemminger2016-09-011-1/+1
| | | | | | | | | Update the sky2 driver to pass number of packets done to NAPI. The driver was never updated when napi_complete_done was added. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ethernet: stmmac: add support of Synopsys 3.50a MAC IPAlexandre TORGUE2016-09-011-0/+1
| | | | | | | | | Adds support of Synopsys 3.50a MAC IP in stmmac driver. Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Tested-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Alexandre TORGUE <alexandre.torgue@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ethernet: dwmac: add Ethernet glue logic for stm32 chipAlexandre TORGUE2016-09-013-0/+206
| | | | | | | | | | | | | stm324xx family chips support Synopsys MAC 3.510 IP. This patch adds settings for logical glue logic: -clocks -mode selection MII or RMII. Reviewed-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Tested-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Alexandre TORGUE <alexandre.torgue@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: xgene: fix backward compatibility fixArnd Bergmann2016-09-011-4/+0
| | | | | | | | | | | | | | | | | | | | | | | A bugfix for backward compatibility handling introduced undefined behavior for the case that of_parse_phandle() does not return a valid entry, as "gcc -Wmaybe-unused" reports: drivers/net/ethernet/apm/xgene/xgene_enet_hw.c: In function 'xgene_enet_phy_connect': drivers/net/ethernet/apm/xgene/xgene_enet_hw.c:776:6: error: 'phy_dev' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/net/ethernet/apm/xgene/xgene_enet_hw.c: In function 'xgene_enet_mdio_config': drivers/net/ethernet/apm/xgene/xgene_enet_hw.c:776:6: error: 'phy_dev' may be used uninitialized in this function [-Werror=maybe-uninitialized] We can work around this by removing the check for zero "np", as of_phy_connect() will correctly handle a NULL argument so we fall back into the normal error handling case. Note that I had previously fixed another bug that resulted in the exact same warning, but this is a different problem that was introduced after my original fix. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 03377e381bf4 ("drivers: net: xgene: Fix backward compatibility") Signed-off-by: David S. Miller <davem@davemloft.net>
* r8152: fix the coding style with checkpatch.plhayeswang2016-09-011-6/+5
| | | | | | | check the coding style with checkpatch.pl and fix the warnings and errors. Signed-off-by: Hayes Wang <hayeswang@realtek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: asix: autoneg will set WRITE_MEDIUM regRobert Foss2016-08-311-4/+1
| | | | | | | | | | | | | | | | | | From: Grant Grundler <grundler@chromium.org> The miii_nway_restart() causes a PHY link change activity and ax88772_link_reset will be called. link_reset will set AX_CMD_WRITE_MEDIUM_MODE register correctly. The asix_write_medium_mode in reset() fills in a default value to the register which may be different from the negotiation result. So do this first. Ignore the ret value since it's ignored in XXX_link_reset() functions. Signed-off-by: Grant Grundler <grundler@google.com> Signed-off-by: Robert Foss <robert.foss@collabora.com> Tested-by: Robert Foss <robert.foss@collabora.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: asix: see 802.3 spec for phy resetRobert Foss2016-08-311-3/+24
| | | | | | | | | | | | | | | From: Grant Grundler <grundler@chromium.org> https://lkml.org/lkml/2014/11/11/947 Ben Hutchings is correct. IEEE 802.3 spec section "22.2.4.1.1 Reset" requires up to 500ms delay. Mitigate the "max" delay by polling the phy until BCM_RESET bit is clear. Signed-off-by: Grant Grundler <grundler@chromium.org> Signed-off-by: Robert Foss <robert.foss@collabora.com> Tested-by: Robert Foss <robert.foss@collabora.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: asix: Fix AX88772x resume failuresRobert Foss2016-08-311-1/+46
| | | | | | | | | | | | | | From: Allan Chou <allan@asix.com.tw> The change fixes AX88772x resume failure by - Restore incorrect AX88772A PHY registers when resetting - Need to stop MAC operation when suspending - Need to restart MII when restoring PHY Signed-off-by: Allan Chou <allan@asix.com.tw> Signed-off-by: Robert Foss <robert.foss@collabora.com> Tested-by: Robert Foss <robert.foss@collabora.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: asix: Avoid looping when the device is disconnectedRobert Foss2016-08-312-12/+46
| | | | | | | | | | | | From: Vincent Palatin <vpalatin@chromium.org> Check the answers from the USB stack and avoid re-sending multiple times the request if the device has disappeared. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Signed-off-by: Robert Foss <robert.foss@collabora.com> Tested-by: Robert Foss <robert.foss@collabora.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: asix: Add in_pm parameterRobert Foss2016-08-314-150/+472
| | | | | | | | | | | | | | | | | | From: Freddy Xin <freddy@asix.com.tw> In order to R/W registers in suspend/resume functions, in_pm flags are added to some functions to determine whether the nopm version of usb functions is called. Save BMCR and ANAR PHY registers in suspend function and restore them in resume function. Reset HW in resume function to ensure the PHY works correctly. Signed-off-by: Freddy Xin <freddy@asix.com.tw> Signed-off-by: Robert Foss <robert.foss@collabora.com> Tested-by: Robert Foss <robert.foss@collabora.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: axienet: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Suggested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* r8152: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Suggested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: mediatek: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Suggested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* ppp: declare PPP devices as LLTXGuillaume Nault2016-08-311-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ppp_xmit_process() already locks the xmit path. If HARD_TX_LOCK() tries to hold the _xmit_lock we can get lock inversion. [ 973.726130] ====================================================== [ 973.727311] [ INFO: possible circular locking dependency detected ] [ 973.728546] 4.8.0-rc2 #1 Tainted: G O [ 973.728986] ------------------------------------------------------- [ 973.728986] accel-pppd/1806 is trying to acquire lock: [ 973.728986] (&qdisc_xmit_lock_key){+.-...}, at: [<ffffffff8146f6fe>] sch_direct_xmit+0x8d/0x221 [ 973.728986] [ 973.728986] but task is already holding lock: [ 973.728986] (l2tp_sock){+.-...}, at: [<ffffffffa0202c4a>] l2tp_xmit_skb+0x1e8/0x5d7 [l2tp_core] [ 973.728986] [ 973.728986] which lock already depends on the new lock. [ 973.728986] [ 973.728986] [ 973.728986] the existing dependency chain (in reverse order) is: [ 973.728986] -> #3 (l2tp_sock){+.-...}: [ 973.728986] [<ffffffff810b3130>] lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff815752f4>] _raw_spin_lock+0x2d/0x3c [ 973.728986] [<ffffffffa0202c4a>] l2tp_xmit_skb+0x1e8/0x5d7 [l2tp_core] [ 973.728986] [<ffffffffa01b2466>] pppol2tp_xmit+0x1f2/0x25e [l2tp_ppp] [ 973.728986] [<ffffffffa0184f59>] ppp_channel_push+0xb5/0x14a [ppp_generic] [ 973.728986] [<ffffffffa01853ed>] ppp_write+0x104/0x11c [ppp_generic] [ 973.728986] [<ffffffff811b2ec6>] __vfs_write+0x56/0x120 [ 973.728986] [<ffffffff811b3f4c>] vfs_write+0xbd/0x11b [ 973.728986] [<ffffffff811b4cb2>] SyS_write+0x5e/0x96 [ 973.728986] [<ffffffff81575ba5>] entry_SYSCALL_64_fastpath+0x18/0xa8 [ 973.728986] -> #2 (&(&pch->downl)->rlock){+.-...}: [ 973.728986] [<ffffffff810b3130>] lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff81575334>] _raw_spin_lock_bh+0x31/0x40 [ 973.728986] [<ffffffffa01808e2>] ppp_push+0xa7/0x82d [ppp_generic] [ 973.728986] [<ffffffffa0184675>] __ppp_xmit_process+0x48/0x877 [ppp_generic] [ 973.728986] [<ffffffffa018505b>] ppp_xmit_process+0x4b/0xaf [ppp_generic] [ 973.728986] [<ffffffffa01853f7>] ppp_write+0x10e/0x11c [ppp_generic] [ 973.728986] [<ffffffff811b2ec6>] __vfs_write+0x56/0x120 [ 973.728986] [<ffffffff811b3f4c>] vfs_write+0xbd/0x11b [ 973.728986] [<ffffffff811b4cb2>] SyS_write+0x5e/0x96 [ 973.728986] [<ffffffff81575ba5>] entry_SYSCALL_64_fastpath+0x18/0xa8 [ 973.728986] -> #1 (&(&ppp->wlock)->rlock){+.-...}: [ 973.728986] [<ffffffff810b3130>] lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff81575334>] _raw_spin_lock_bh+0x31/0x40 [ 973.728986] [<ffffffffa0184654>] __ppp_xmit_process+0x27/0x877 [ppp_generic] [ 973.728986] [<ffffffffa018505b>] ppp_xmit_process+0x4b/0xaf [ppp_generic] [ 973.728986] [<ffffffffa01852da>] ppp_start_xmit+0x21b/0x22a [ppp_generic] [ 973.728986] [<ffffffff8143f767>] dev_hard_start_xmit+0x1a9/0x43d [ 973.728986] [<ffffffff8146f747>] sch_direct_xmit+0xd6/0x221 [ 973.728986] [<ffffffff814401e4>] __dev_queue_xmit+0x62a/0x912 [ 973.728986] [<ffffffff814404d7>] dev_queue_xmit+0xb/0xd [ 973.728986] [<ffffffff81449978>] neigh_direct_output+0xc/0xe [ 973.728986] [<ffffffff8150e62b>] ip6_finish_output2+0x5a9/0x623 [ 973.728986] [<ffffffff81512128>] ip6_output+0x15e/0x16a [ 973.728986] [<ffffffff8153ef86>] dst_output+0x76/0x7f [ 973.728986] [<ffffffff8153f737>] mld_sendpack+0x335/0x404 [ 973.728986] [<ffffffff81541c61>] mld_send_initial_cr.part.21+0x99/0xa2 [ 973.728986] [<ffffffff8154441d>] ipv6_mc_dad_complete+0x42/0x71 [ 973.728986] [<ffffffff8151c4bd>] addrconf_dad_completed+0x1cf/0x2ea [ 973.728986] [<ffffffff8151e4fa>] addrconf_dad_work+0x453/0x520 [ 973.728986] [<ffffffff8107a393>] process_one_work+0x365/0x6f0 [ 973.728986] [<ffffffff8107aecd>] worker_thread+0x2de/0x421 [ 973.728986] [<ffffffff810816fb>] kthread+0x121/0x130 [ 973.728986] [<ffffffff81575dbf>] ret_from_fork+0x1f/0x40 [ 973.728986] -> #0 (&qdisc_xmit_lock_key){+.-...}: [ 973.728986] [<ffffffff810b28d6>] __lock_acquire+0x1118/0x1483 [ 973.728986] [<ffffffff810b3130>] lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff815752f4>] _raw_spin_lock+0x2d/0x3c [ 973.728986] [<ffffffff8146f6fe>] sch_direct_xmit+0x8d/0x221 [ 973.728986] [<ffffffff814401e4>] __dev_queue_xmit+0x62a/0x912 [ 973.728986] [<ffffffff814404d7>] dev_queue_xmit+0xb/0xd [ 973.728986] [<ffffffff81449978>] neigh_direct_output+0xc/0xe [ 973.728986] [<ffffffff81487811>] ip_finish_output2+0x5db/0x609 [ 973.728986] [<ffffffff81489590>] ip_finish_output+0x152/0x15e [ 973.728986] [<ffffffff8148a0d4>] ip_output+0x8c/0x96 [ 973.728986] [<ffffffff81489652>] ip_local_out+0x41/0x4a [ 973.728986] [<ffffffff81489e7d>] ip_queue_xmit+0x5a5/0x609 [ 973.728986] [<ffffffffa0202fe4>] l2tp_xmit_skb+0x582/0x5d7 [l2tp_core] [ 973.728986] [<ffffffffa01b2466>] pppol2tp_xmit+0x1f2/0x25e [l2tp_ppp] [ 973.728986] [<ffffffffa0184f59>] ppp_channel_push+0xb5/0x14a [ppp_generic] [ 973.728986] [<ffffffffa01853ed>] ppp_write+0x104/0x11c [ppp_generic] [ 973.728986] [<ffffffff811b2ec6>] __vfs_write+0x56/0x120 [ 973.728986] [<ffffffff811b3f4c>] vfs_write+0xbd/0x11b [ 973.728986] [<ffffffff811b4cb2>] SyS_write+0x5e/0x96 [ 973.728986] [<ffffffff81575ba5>] entry_SYSCALL_64_fastpath+0x18/0xa8 [ 973.728986] [ 973.728986] other info that might help us debug this: [ 973.728986] [ 973.728986] Chain exists of: &qdisc_xmit_lock_key --> &(&pch->downl)->rlock --> l2tp_sock [ 973.728986] Possible unsafe locking scenario: [ 973.728986] [ 973.728986] CPU0 CPU1 [ 973.728986] ---- ---- [ 973.728986] lock(l2tp_sock); [ 973.728986] lock(&(&pch->downl)->rlock); [ 973.728986] lock(l2tp_sock); [ 973.728986] lock(&qdisc_xmit_lock_key); [ 973.728986] [ 973.728986] *** DEADLOCK *** [ 973.728986] [ 973.728986] 6 locks held by accel-pppd/1806: [ 973.728986] #0: (&(&pch->downl)->rlock){+.-...}, at: [<ffffffffa0184efa>] ppp_channel_push+0x56/0x14a [ppp_generic] [ 973.728986] #1: (l2tp_sock){+.-...}, at: [<ffffffffa0202c4a>] l2tp_xmit_skb+0x1e8/0x5d7 [l2tp_core] [ 973.728986] #2: (rcu_read_lock){......}, at: [<ffffffff81486981>] rcu_lock_acquire+0x0/0x20 [ 973.728986] #3: (rcu_read_lock_bh){......}, at: [<ffffffff81486981>] rcu_lock_acquire+0x0/0x20 [ 973.728986] #4: (rcu_read_lock_bh){......}, at: [<ffffffff814340e3>] rcu_lock_acquire+0x0/0x20 [ 973.728986] #5: (dev->qdisc_running_key ?: &qdisc_running_key#2){+.....}, at: [<ffffffff8144011e>] __dev_queue_xmit+0x564/0x912 [ 973.728986] [ 973.728986] stack backtrace: [ 973.728986] CPU: 2 PID: 1806 Comm: accel-pppd Tainted: G O 4.8.0-rc2 #1 [ 973.728986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 973.728986] ffff7fffffffffff ffff88003436f850 ffffffff812a20f4 ffffffff82156e30 [ 973.728986] ffffffff82156920 ffff88003436f890 ffffffff8115c759 ffff88003344ae00 [ 973.728986] ffff88003344b5c0 0000000000000002 0000000000000006 ffff88003344b5e8 [ 973.728986] Call Trace: [ 973.728986] [<ffffffff812a20f4>] dump_stack+0x67/0x90 [ 973.728986] [<ffffffff8115c759>] print_circular_bug+0x22e/0x23c [ 973.728986] [<ffffffff810b28d6>] __lock_acquire+0x1118/0x1483 [ 973.728986] [<ffffffff810b3130>] lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff810b3130>] ? lock_acquire+0x150/0x217 [ 973.728986] [<ffffffff8146f6fe>] ? sch_direct_xmit+0x8d/0x221 [ 973.728986] [<ffffffff815752f4>] _raw_spin_lock+0x2d/0x3c [ 973.728986] [<ffffffff8146f6fe>] ? sch_direct_xmit+0x8d/0x221 [ 973.728986] [<ffffffff8146f6fe>] sch_direct_xmit+0x8d/0x221 [ 973.728986] [<ffffffff814401e4>] __dev_queue_xmit+0x62a/0x912 [ 973.728986] [<ffffffff814404d7>] dev_queue_xmit+0xb/0xd [ 973.728986] [<ffffffff81449978>] neigh_direct_output+0xc/0xe [ 973.728986] [<ffffffff81487811>] ip_finish_output2+0x5db/0x609 [ 973.728986] [<ffffffff81486853>] ? dst_mtu+0x29/0x2e [ 973.728986] [<ffffffff81489590>] ip_finish_output+0x152/0x15e [ 973.728986] [<ffffffff8148a0bc>] ? ip_output+0x74/0x96 [ 973.728986] [<ffffffff8148a0d4>] ip_output+0x8c/0x96 [ 973.728986] [<ffffffff81489652>] ip_local_out+0x41/0x4a [ 973.728986] [<ffffffff81489e7d>] ip_queue_xmit+0x5a5/0x609 [ 973.728986] [<ffffffff814c559e>] ? udp_set_csum+0x207/0x21e [ 973.728986] [<ffffffffa0202fe4>] l2tp_xmit_skb+0x582/0x5d7 [l2tp_core] [ 973.728986] [<ffffffffa01b2466>] pppol2tp_xmit+0x1f2/0x25e [l2tp_ppp] [ 973.728986] [<ffffffffa0184f59>] ppp_channel_push+0xb5/0x14a [ppp_generic] [ 973.728986] [<ffffffffa01853ed>] ppp_write+0x104/0x11c [ppp_generic] [ 973.728986] [<ffffffff811b2ec6>] __vfs_write+0x56/0x120 [ 973.728986] [<ffffffff8124c11d>] ? fsnotify_perm+0x27/0x95 [ 973.728986] [<ffffffff8124d41d>] ? security_file_permission+0x4d/0x54 [ 973.728986] [<ffffffff811b3f4c>] vfs_write+0xbd/0x11b [ 973.728986] [<ffffffff811b4cb2>] SyS_write+0x5e/0x96 [ 973.728986] [<ffffffff81575ba5>] entry_SYSCALL_64_fastpath+0x18/0xa8 [ 973.728986] [<ffffffff810ae0fa>] ? trace_hardirqs_off_caller+0x121/0x12f Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* ppp: avoid dealock on recursive xmitGuillaume Nault2016-08-311-12/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of misconfiguration, a virtual PPP channel might send packets back to their parent PPP interface. This typically happens in misconfigured L2TP setups, where PPP's peer IP address is set with the IP of the L2TP peer. When that happens the system hangs due to PPP trying to recursively lock its xmit path. [ 243.332155] BUG: spinlock recursion on CPU#1, accel-pppd/926 [ 243.333272] lock: 0xffff880033d90f18, .magic: dead4ead, .owner: accel-pppd/926, .owner_cpu: 1 [ 243.334859] CPU: 1 PID: 926 Comm: accel-pppd Not tainted 4.8.0-rc2 #1 [ 243.336010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 243.336018] ffff7fffffffffff ffff8800319a77a0 ffffffff8128de85 ffff880033d90f18 [ 243.336018] ffff880033ad8000 ffff8800319a77d8 ffffffff810ad7c0 ffffffff0000039e [ 243.336018] ffff880033d90f18 ffff880033d90f60 ffff880033d90f18 ffff880033d90f28 [ 243.336018] Call Trace: [ 243.336018] [<ffffffff8128de85>] dump_stack+0x4f/0x65 [ 243.336018] [<ffffffff810ad7c0>] spin_dump+0xe1/0xeb [ 243.336018] [<ffffffff810ad7f0>] spin_bug+0x26/0x28 [ 243.336018] [<ffffffff810ad8b9>] do_raw_spin_lock+0x5c/0x160 [ 243.336018] [<ffffffff815522aa>] _raw_spin_lock_bh+0x35/0x3c [ 243.336018] [<ffffffffa01a88e2>] ? ppp_push+0xa7/0x82d [ppp_generic] [ 243.336018] [<ffffffffa01a88e2>] ppp_push+0xa7/0x82d [ppp_generic] [ 243.336018] [<ffffffff810adada>] ? do_raw_spin_unlock+0xc2/0xcc [ 243.336018] [<ffffffff81084962>] ? preempt_count_sub+0x13/0xc7 [ 243.336018] [<ffffffff81552438>] ? _raw_spin_unlock_irqrestore+0x34/0x49 [ 243.336018] [<ffffffffa01ac657>] ppp_xmit_process+0x48/0x877 [ppp_generic] [ 243.336018] [<ffffffff81084962>] ? preempt_count_sub+0x13/0xc7 [ 243.336018] [<ffffffff81408cd3>] ? skb_queue_tail+0x71/0x7c [ 243.336018] [<ffffffffa01ad1c5>] ppp_start_xmit+0x21b/0x22a [ppp_generic] [ 243.336018] [<ffffffff81426af1>] dev_hard_start_xmit+0x15e/0x32c [ 243.336018] [<ffffffff81454ed7>] sch_direct_xmit+0xd6/0x221 [ 243.336018] [<ffffffff814273a8>] __dev_queue_xmit+0x52a/0x820 [ 243.336018] [<ffffffff814276a9>] dev_queue_xmit+0xb/0xd [ 243.336018] [<ffffffff81430a3c>] neigh_direct_output+0xc/0xe [ 243.336018] [<ffffffff8146b5d7>] ip_finish_output2+0x4d2/0x548 [ 243.336018] [<ffffffff8146a8e6>] ? dst_mtu+0x29/0x2e [ 243.336018] [<ffffffff8146d49c>] ip_finish_output+0x152/0x15e [ 243.336018] [<ffffffff8146df84>] ? ip_output+0x74/0x96 [ 243.336018] [<ffffffff8146df9c>] ip_output+0x8c/0x96 [ 243.336018] [<ffffffff8146d55e>] ip_local_out+0x41/0x4a [ 243.336018] [<ffffffff8146dd15>] ip_queue_xmit+0x531/0x5c5 [ 243.336018] [<ffffffff814a82cd>] ? udp_set_csum+0x207/0x21e [ 243.336018] [<ffffffffa01f2f04>] l2tp_xmit_skb+0x582/0x5d7 [l2tp_core] [ 243.336018] [<ffffffffa01ea458>] pppol2tp_xmit+0x1eb/0x257 [l2tp_ppp] [ 243.336018] [<ffffffffa01acf17>] ppp_channel_push+0x91/0x102 [ppp_generic] [ 243.336018] [<ffffffffa01ad2d8>] ppp_write+0x104/0x11c [ppp_generic] [ 243.336018] [<ffffffff811a3c1e>] __vfs_write+0x56/0x120 [ 243.336018] [<ffffffff81239801>] ? fsnotify_perm+0x27/0x95 [ 243.336018] [<ffffffff8123ab01>] ? security_file_permission+0x4d/0x54 [ 243.336018] [<ffffffff811a4ca4>] vfs_write+0xbd/0x11b [ 243.336018] [<ffffffff811a5a0a>] SyS_write+0x5e/0x96 [ 243.336018] [<ffffffff81552a1b>] entry_SYSCALL_64_fastpath+0x13/0x94 The main entry points for sending packets over a PPP unit are the .write() and .ndo_start_xmit() callbacks (simplified view): .write(unit fd) or .ndo_start_xmit() \ CALL ppp_xmit_process() \ LOCK unit's xmit path (ppp->wlock) | CALL ppp_push() \ LOCK channel's xmit path (chan->downl) | CALL lower layer's .start_xmit() callback \ ... might recursively call .ndo_start_xmit() ... / RETURN from .start_xmit() | UNLOCK channel's xmit path / RETURN from ppp_push() | UNLOCK unit's xmit path / RETURN from ppp_xmit_process() Packets can also be directly sent on channels (e.g. LCP packets): .write(channel fd) or ppp_output_wakeup() \ CALL ppp_channel_push() \ LOCK channel's xmit path (chan->downl) | CALL lower layer's .start_xmit() callback \ ... might call .ndo_start_xmit() ... / RETURN from .start_xmit() | UNLOCK channel's xmit path / RETURN from ppp_channel_push() Key points about the lower layer's .start_xmit() callback: * It can be called directly by a channel fd .write() or by ppp_output_wakeup() or indirectly by a unit fd .write() or by .ndo_start_xmit(). * In any case, it's always called with chan->downl held. * It might route the packet back to its parent unit using .ndo_start_xmit() as entry point. This patch detects and breaks recursion in ppp_xmit_process(). This function is a good candidate for the task because it's called early enough after .ndo_start_xmit(), it's always part of the recursion loop and it's on the path of whatever entry point is used to send a packet on a PPP unit. Recursion detection is done using the per-cpu ppp_xmit_recursion variable. Since ppp_channel_push() too locks the channel's xmit path and calls the lower layer's .start_xmit() callback, we need to also increment ppp_xmit_recursion there. However there's no need to check for recursion, as it's out of the recursion loop. Reported-by: Feng Gao <gfree.wind@gmail.com> Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* xgbe: constify get_netdev_ops and get_ethtool_opsstephen hemminger2016-08-313-6/+7
| | | | | | | | | | | Casting away const is bad practice. Since this is ARM specific driver don't have hardware actually test this. Having getter functions for ops is really unnecessary code bloat, but not going to touch that. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: dsa: mv88e6xxx: add MDB supportVivien Didelot2016-08-311-0/+65
| | | | | | | | Add support for the MDB operations. This consists of loading/purging/dumping multicast addresses for a given port in the ATU. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: dsa: mv88e6xxx: make switchdev DB ops genericVivien Didelot2016-08-311-43/+57
| | | | | | | | | | | | | The MDB support for the mv88e6xxx driver will be very similar to the FDB support, since it consists of loading/purging/dumping address to/from the Address Translation Unit (ATU). Prepare the support for MDB by making the FDB code accessing the ATU generic. The FDB operations now provide access to the unicast addresses while the MDB operations will provide access to the multicast addresses. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX firmware downloadRaghu Vatsavayi2016-08-313-46/+111
| | | | | | | | | | Add firmware download support for cn23xx device. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: MSIX support for CN23XXRaghu Vatsavayi2016-08-316-69/+452
| | | | | | | | | | This patch adds support msix interrupt for cn23xx device. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX queue manipulationRaghu Vatsavayi2016-08-315-8/+225
| | | | | | | | | | This patch adds support for cn23xx queue manipulation. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX register setupRaghu Vatsavayi2016-08-314-8/+316
| | | | | | | | | | | Adds support for initializing cn23xx device registers related to mac, input/output and pf global config. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX device init and sriov configRaghu Vatsavayi2016-08-314-1/+544
| | | | | | | | | | Add support for cn23xx device init and sriov queue config. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX queue definitionsRaghu Vatsavayi2016-08-316-33/+286
| | | | | | | | | | | Add support for cn23xx specific queue definitions and features. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: CN23XX register definitionsRaghu Vatsavayi2016-08-311-0/+604
| | | | | | | | | | | This patch adds register definitions and structures for new device cn23xx. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: Common enable irq functionRaghu Vatsavayi2016-08-318-14/+48
| | | | | | | | | | | Add support of common irq enable functionality for both iq(instruction queue) and oq(output queue). Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: Firmware version managementRaghu Vatsavayi2016-08-312-5/+27
| | | | | | | | | | This patch contains changes for firmware version management. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* liquidio: Consolidate common functionalityRaghu Vatsavayi2016-08-3115-444/+426
| | | | | | | | | | | Consolidate common functionality of various devices from different files into lio_core.c/octeon_console.c. Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: wan: sbni: Spelling s/acknoweledge/acknowledge/, GrammarGeert Uytterhoeven2016-08-311-2/+2
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: systemport: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* dwc_eth_qos: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: hisilicon: constify ethtool_ops structuresJulia Lawall2016-08-314-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: bcmgenet: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ethernet: et131x: constify ethtool_ops structuresJulia Lawall2016-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for ethtool_ops structures that are only stored in the ethtool_ops field of a net_device structure or passed as the second argument to netdev_set_default_ethtool_ops. These contexts are declared const, so ethtool_ops structures that have these properties can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct ethtool_ops i@p = { ... }; @ok1@ identifier r.i; struct net_device e; position p; @@ e.ethtool_ops = &i@p; @ok2@ identifier r.i; expression e; position p; @@ netdev_set_default_ethtool_ops(e, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ethtool_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Mark Einon <mark.einon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qede: hide 32-bit compile warningArnd Bergmann2016-08-301-1/+1
| | | | | | | | | | | | | | | | | | | The addition of the per-queue statistics introduced a harmless warning on all 32-bit architectures: drivers/net/ethernet/qlogic/qede/qede_ethtool.c: In function 'qede_get_ethtool_stats': drivers/net/ethernet/qlogic/qede/qede_ethtool.c:244:31: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] buf[cnt++] = QEDE_TQSTATS_DATA(edev, ^ drivers/net/ethernet/qlogic/qede/qede_ethtool.c:244:22: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] buf[cnt++] = QEDE_TQSTATS_DATA(edev, ^ This changes the cast to 'void *' to shut up the warning, which avoids the assumptions on the size of the pointer type. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 68db9ec2df07 ("qede: Add support for per-queue stats.") Signed-off-by: David S. Miller <davem@davemloft.net>
* ravb: avoid unused function warningsArnd Bergmann2016-08-301-10/+4
| | | | | | | | | | | | | | | When CONFIG_PM_SLEEP is disabled, we get a couple of harmless warnings: drivers/net/ethernet/renesas/ravb_main.c:2117:12: error: 'ravb_resume' defined but not used [-Werror=unused-function] drivers/net/ethernet/renesas/ravb_main.c:2104:12: error: 'ravb_suspend' defined but not used [-Werror=unused-function] The simplest solution here is to replace the #ifdef with __maybe_unused annotations, which lets the compiler do the right thing by itself. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 0184165b2f42 ("ravb: add sleep PM suspend/resume support") Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: veth: Set features for MPLSDavid Ahern2016-08-301-0/+1
| | | | | | | | | | | veth does not really transmit packets only moves the skb from one netdev to another so gso and checksum is not really needed. Add the features to mpls_features to get the same benefit and performance with MPLS as without it. Reported-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ixgbe: Eliminate useless message and improve logicMark Rustad2016-08-301-11/+5
| | | | | | | | | | Remove a useless log message and improve the logic for setting a PHY address from the contents of the MNG_IF_SEL register. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers: net: stmmac: fix spelling mistake "mulitcast" -> "multicast"Colin Ian King2016-08-301-1/+1
| | | | | | | Trivial fix to spelling mistake in dev_warn message. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch '100GbE' of ↵David S. Miller2016-08-3010-122/+200
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue Jeff Kirsher says: ==================== 100GbE Intel Wired LAN Driver Updates 2016-08-29 This series contains updates to fm10k only. Jake provides all the changes in this series starting with fixes an issue where VF devices may fail during an unbind/bind and we will never zero the reference counter for the pci_dev structure. Updated the hot path to use SW counters instead of checking for hardware Tx pending for possible transmit hangs, which will improve performance. Fixed the NAPI budget accounting so that fm10k_poll will return actual work done, capped at (budget - 1) instead of returning 0. Added a check to ensure that the device is in the normal IO state before continuing to probe, which allows us to give a more descriptive message of what is wrong in the case of uncorrectable AER error. In preparation for adding Geneve Rx offload support, refactored the current VXLAN offload flow to be a bit more generic. Added support for receive offloads on one Geneve tunnel. Ensure that other bits in the RXQCTL register do not get cleared, to make sure that bits related to queue ownership are maintained. Fixed an issue in queue ownership assignment which casued a race condition between the PF and the VF such that potentially a VF could cause FUM fault errors due to normal PF/VF driver behavior. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * fm10k: don't re-map queues when a mailbox message sufficesJacob Keller2016-08-291-17/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the PF assigns a new MAC address to a VF it uses the base address registers to store the MAC address. This allows a VF which loads after this setup the ability to get the initial address without having to wait for a mailbox message. Unfortunately to do this, the PF must take queue ownership away from the VF, which can cause fault errors when there is already an active VF driver. This queue ownership assignment causes race condition between the PF and the VF such that potentially a VF can cause FUM fault errors due to normal PF/VF driver behavior. It is not safe to simply allow the PF to write the base address registers without taking queue ownership back as the PF must also disable the queues, and this would impact active VF use. The current code is safe because the queue ownership will prevent the VF from actually writing but does trigger the FUM fault. We can do better by simply avoiding the register write process when a mailbox message suffices. If the message can be sent over the mailbox, then we will not perform the queue ownership assignment and we won't update the base address to be the same as the MAC address. We do still have to write the TXQCTL registers in order to update the VID of the queue. This is necessary because the TXQCTL register is read-only from the VF, and thus the VF cannot do this for itself. This register does not need to wait for the Tx queue to be disabled and is safe for the PF to write during normal VF operation, so we move this write to the top of the function above the mailbox message. Without this, the TXQCTL register would be misconfigured and cause the VF to Tx hang. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-19 19:02:28 +0000