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* Fix "frist", "fisrt", typosUwe Zeisberger2006-03-221-1/+1
| | | | | Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] regularize blk_cleanup_queue() useAl Viro2006-03-181-4/+4
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] "s390: multiple subchannel sets support" fixGreg Smith2006-03-141-0/+3
| | | | | | | | | | | It seems this patch got dropped (it was in addition to the `s390: improve response code handling in chsc_enable_facility()' patch). Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds2006-03-143-7/+13
|\ | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] zfcp: fix device registration issues [SCSI] scsi_transport_fc: fix FC_HOST_NUM_ATTRS [SCSI] scsi: aha152x pcmcia driver needs spi transport [SCSI] zfcp: correctly set this_id for hosts [SCSI] Add Brownie to blacklist
| * [SCSI] zfcp: fix device registration issuesAndreas Herrmann2006-03-093-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch fixes following issues: (1) Replace scsi_add_device with scsi_scan_target. (Thus the rport instead of the scsi_host becomes parent of a scsi_target again.) (2) Avoid scsi_device allocation during registration of an remote port. (Would be done during fc_scsi_scan_rport.) (3) Fix queuecommand behaviour when an zfcp unit is blocked. (Call scsi_done with DID_NO_CONNECT instead of returning SCSI_MLQUEUE_DEVICE_BUSY otherwise we might end up waiting for completion in blk_execute_rq for ever.) Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: correctly set this_id for hostsAndreas Herrmann2006-03-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It fixes a bug in zfcp which provokes a race in scsi_scan.c. Finally this can lead to an Oops like: kernel BUG at fs/sysfs/symlink.c:87! Correctly set this_id for the host. Otherwise we provoke a race between scsi_target_reap_work and concurrent scsi_add_device. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | [PATCH] s390: dasd proc interface typoHorst Hummel2006-03-091-1/+1
| | | | | | | | | | | | | | | | | | This fixes a typo introduced with 90f0094dc607abe384a412bfb7199fb667ab0735. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: dasd partition detectionHorst Hummel2006-03-084-14/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DASD allows to open a device as soon as gendisk is registered, which means the device is a fake device (capacity=0) and we do know nothing about blocksize and partitions at that point of time. In case the device is opened by someone, the bdev and inode creation is done with the fake device info and the following partition detection code is just using the wrong data. To avoid this modify the DASD state machine to make sure that the open is rejected until the device analysis is either finished or an unformatted device was detected. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: iucv message limit for smsgMartin Schwidefsky2006-03-081-1/+1
| | | | | | | | | | | | | | | | | | | | The message limit on the iucv connect call for the smsg module is too low. Therefore increase the smsg message limit to 255. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: improve response code handling in chsc_enable_facility()Cornelia Huck2006-03-061-0/+5
|/ | | | | | | | | | | | | Rather than checking for some known failures, check positively for the success response code 0x0001 and return -EIO for unrecognized failure response codes. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Greg Smith <gsmith@nc.rr.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: revert dasd eer moduleHeiko Carstens2006-02-207-1219/+4
| | | | | | | | | Revert dasd eer module until we have a common understanding of how the interface should be. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: dasd reference countingPeter Oberparleiter2006-02-202-1/+21
| | | | | | | | | | | | | | When using the dasd diag discipline, the base discipline module (eckd or fba) can be unloaded, even though the dasd driver requires both discipline modules (base and diag) to work correctly. Implement reference counting for both base and diag discipline modules in order to fix this. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: V=V qdio fixesFrank Pavlic2006-02-201-2/+11
| | | | | | | | | | | | | | | | | Using FCP devices with V=V support, the input queue stalled when CCQ 97 had been returned in qdio_do_eqbs. When this happen we have to reissue the eqbs instruction. Another bug was when V=V was enabled we checked if hardware has SIGA-sync support. If not we returned with 0 from tiqdio_is_inbound_q_done. Thus qdio lost initiative on FCP devices and input queue stalled. Running devices in V=V there is no SIGA-sync support but nevertheless we have to process tiqdio_is_inbound_q_done either. Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fix assignment instead of check in ccw_device_set_online()Cornelia Huck2006-02-172-2/+1
| | | | | | | | | | Fix assignment instead of check in ccw_device_set_online(). Also remove unneeded assignment in ccw_device_do_sense(). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: ccw device disbandingCornelia Huck2006-02-171-1/+1
| | | | | | | | | | | If __ccw_device_disband_start() fails to initiate disbanding, it should finish with ccw_device_disband_done() (which leaves the device in offline state) instead of ccw_device_verify_done() (which leaves the device in online state). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: some qeth driver fixesFrank Pavlic2006-02-173-77/+63
| | | | | | | | | | | | | | | | | | | | | | | | [patch 2/2] s390: some qeth driver fixes From: Frank Pavlic <fpavlic@de.ibm.com> - fixed kernel panic when using EDDP support in Layer 2 mode - NULL pointer exception in qeth_set_offline fixed. - setting EDDP in Layer 2 mode did not set NETIF_F_(SG/TSO) flags when device became online. - use sscanf for parsing and converting IPv4 addresses from string to __u8 values. - qeth_string_to_ipaddr6 fixed. in case of double colon the converted IPv6 address out from the string was not correct in previous implementation. Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com> diffstat: qeth.h | 112 +++++++++++++++++++++++++----------------------------------- qeth_eddp.c | 11 ++++- qeth_main.c | 17 +++------ 3 files changed, 63 insertions(+), 77 deletions(-) Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* [PATCH] s390: lcs performance enhancementsFrank Pavlic2006-02-172-15/+18
| | | | | | | | | | | | | | | | | | | | [patch 1/2] s390: lcs performance enhancements From: Klaus Wacker <kdwacker@de.ibm.com> - When flood pinging (with large packet size) an LCS device, about 90 % of all packets are dropped by driver. - increased number of lcs IO buffers to 32. - use netif_stop_queue/netif_wake_queue in lcs_start_xmit routine - don't lock the whole xmit routine but just the piece of code where tx_buffer is touched. Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com> diffstat: lcs.c | 31 +++++++++++++++++-------------- lcs.h | 2 +- 2 files changed, 18 insertions(+), 15 deletions(-) Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds2006-02-167-157/+118
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| * [SCSI] zfcp: fix: avoid race between fc_remote_port_add and scsi_add_deviceAndreas Herrmann2006-02-121-0/+2
| | | | | | | | | | | | | | | | | | Flush workqueue of a scsi host after a remote port for that host is registered at the fc transport class. Otherwise immediate registration of a scsi device on that host is racy. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: fix logging during device resetMaxim Shchetynin2006-02-125-61/+47
| | | | | | | | | | | | | | | | Avoid access to old fsf_requests if device reset is logged. Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com> Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: fix adapter erp when link is unpluggedAndreas Herrmann2006-02-123-90/+69
| | | | | | | | | | | | | | | | Remove endless polling for replug of the local link. Just wait for link up notification. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: get rid of physical_wwpn and physical_s_idAndreas Herrmann2006-02-122-6/+0
| | | | | | | | | | | | | | | | Remove all remainders of obsolete zfcp adapter attributes physical_wwpn and physical_s_id. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | [PATCH] s390: fix sclp memory corruption in tty pages listPeter Oberparleiter2006-02-111-8/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the sclp interface takes very long to serve a request, the sclp core driver will report a failed request to the sclp tty driver even though the request is still being processed by the sclp interface. Eventually the sclp interface completes the request and updates some fields in the request buffer which leads to a corrupted tty pages list. The next time function sclp_tty_write_room is called, the corrupted list will be traversed, resulting in an oops. To avoid this remove the busy retry limit and increase retry intervals. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: fix locking in __chp_add() and s390_subchannel_remove_chpid()Cornelia Huck2006-02-111-5/+5
|/ | | | | | | | | | | Fix locking in __chp_add() and s390_subchannel_remove_chpid(): Need to disable/enable because they are always called from a thread (and not directly from a machine check...) Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fix to_channelpath macroCornelia Huck2006-02-031-1/+1
| | | | | | | | | Fix broken to_channelpath macro (fortunately worked in all current cases...). Signed-off-by: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: dasd extended error reporting moduleStefan Weinhuber2006-02-037-4/+1219
| | | | | | | | | | | | The DASD extended error reporting is a facility that allows to get detailed information about certain problems in the DASD I/O. This information can be used to implement fail-over applications that can recover these problems. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ebcdic do_kdsk_ioctl off-by-oneDavi Arnaut2006-02-011-1/+5
| | | | | | | | | | | Add a missing return check from strnlen_user and fixes a off-by-one when terminating the string with zero. Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: Add missing memory constraint to stcrw()Peter Oberparleiter2006-02-011-8/+9
| | | | | | | | | Add missing memory constraint to stcrw() inline assembly. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: Fix modalias for ccw devicesCornelia Huck2006-02-011-1/+1
| | | | | | | | | Fix modalias for ccw devices: cu_type should be in capitals as well. Signed-off-by: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: dasd wait for clear i/o interruptHorst Hummel2006-02-011-12/+33
| | | | | | | | | | | | | The sleep_on function clears a running cqr without waiting for the related interrupt. This can lead to a panic at the time the interrupt is processed because the related memory might already be freed. Wait for clear-interrupt and de-queue cqr prior to return. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: dasd open counterHorst Hummel2006-02-011-1/+8
| | | | | | | | | | | | The open_count is increased for every opener, that includes the blkdev_get in dasd_scan_partitions. This tampers the open_count in BIODASDINFO. Hide the internal open from user-space. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: ccw_device_probe_console return valuePeter Oberparleiter2006-02-013-3/+5
| | | | | | | | | | | | | The return code of ccw_device_probe_console() is not properly handled. It should only return a valid ccw device pointer or a error value converted by ERR_PTR. Fix the console driver code to check with IS_ERR instead against NULL. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: hangcheck timer supportJan Glauber2006-02-011-0/+7
| | | | | | | | | | | | | | | Remove useless s390 define from hangcheck-timer, remove wrong definition of a TOD second and other s390 ifdefs. Use monotonic_clock instead. Add hangcheck-timer option, copied from drivers/char/Kconfig. This is ugly but unless we have a big Kconfig cleanup we cannot include drivers/char/Kconfig... Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: Remove CVS generated informationHeiko Carstens2006-02-0176-218/+26
| | | | | | | | | | | | | - Remove all CVS generated information like e.g. revision IDs from drivers/s390 and include/asm-s390 (none present in arch/s390). - Add newline at end of arch/s390/lib/Makefile to avoid diff message. Acked-by: Andreas Herrmann <aherrman@de.ibm.com> Acked-by: Frank Pavlic <pavlic@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-01-151-1/+1
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| * spelling: s/appropiate/appropriate/Adrian Bunk2006-01-151-1/+1
| | | | | | | | Signed-off-by: Adrian Bunk <bunk@stusta.de>
* | [PATCH] s390: fix blk_queue_ordered call in dasd.c fixupHeiko Carstens2006-01-141-1/+1
| | | | | | | | | | | | | | | | | | The QUEUE_ORDERED_* numbers got renumbered and by accident the dasd driver was changed to use QUEUE_ORDERED_DRAIN instead of QUEUE_ORDERED_TAG. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: email-address changeCornelia Huck2006-01-1417-34/+35
| | | | | | | | | | | | | | Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: chps[] array too shortCornelia Huck2006-01-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The chps[] array in struct channel_subsystem is one too short; therefore the code doesn't realize the chpid ff is already known. When several devices on chpid ff become available, the message "new_channel_path: could not register ff" is displayed for every device but the first one. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] s390: fix blk_queue_ordered call in dasdcMartin Schwidefsky2006-01-141-1/+1
|/ | | | | | | | | Add the missing third argument to the blk_queue_ordered call and use the constant QUEUE_ORDERED_DRAIN instead of "1". Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2006-01-149-102/+212
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| * [SCSI] zfcp: transport class adaptations IIAndreas Herrmann2006-01-146-38/+29
| | | | | | | | | | | | | | | | | | | | Replaced zfcp adapter attributes with fc_host attributes: fc_topology by port_type, physical_wwpn by permanent_port_name. Make use of fc_host attribute supported_speeds. Removed zfcp adapter attribute physical_s_id. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: transport class adaptationsAndreas Herrmann2006-01-146-64/+136
| | | | | | | | | | | | | | | | | | | | | | Added host stats, removed superfluous get_starget_ functions, removed some attributes from zfcp specific sysfs tree (e.g. scsi_host_no, scsi_lun, wwnn and d_id). Host stats are given for the physical adapter port not for the virtual adapter. Reset stats is implemented in the device driver. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] zfcp: handle unsolicited status notification lostMaxim Shchetynin2006-01-142-0/+47
| | | | | | | | | | | | | | | | | | Handle unsolicited adapter status that informs about loss of previous unsolicited status notification(s). Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com> Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | [PATCH] Add {css,ccw}_bus_type probe, remove, shutdown methods.Cornelia Huck2006-01-133-28/+62
| | | | | | | | | | | | | | | | | | The following patch converts css_bus_type and ccw_bus_type to use the new bus_type methods. Signed-off-by: Cornelia Huck <huckc@de.ibm.com> CC: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | [PATCH] Add ccwgroup_bus_type probe and remove methodsRussell King2006-01-131-7/+9
|/ | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] TTY layer buffering revampAlan Cox2006-01-104-61/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] don't include ioctl32.h in driversChristoph Hellwig2006-01-101-1/+0
| | | | | | | | | | | These days ioctl32.h is only used for communication of fs/compat.c and fs/compat_ioctl.c and doesn't contain anything of interest to drivers. Remove inclusion in various drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] add ->compat_ioctl to dasdChristoph Hellwig2006-01-103-0/+14
| | | | | | | | | | | | Add a compat_ioctl method to the dasd driver so the last entries in arch/s390/kernel/compat_ioctl.c can go away. Unlike the previous attempt this one does not replace the ioctl method with an unlocked_ioctl method so that the ioctl_by_bdev calls in s390 partition code continue to work. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ->compat_ioctl for 390 tape_charChristoph Hellwig2006-01-101-0/+20
| | | | | | | | | | The only own ioctl, TAPE390_DISPLAY, is compat_clean, everything else is routed through common translation code. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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