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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2014-01-30 10:11:28 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-30 16:25:49 -0800 |
| commit | 0ae89beb283a0db5980d1d4781c7d7be2f2810d6 (patch) | |
| tree | 70260be9219b03dbc8e96f852a8900db7845cbc9 /drivers/net/can/janz-ican3.c | |
| parent | 920a0fde5a32fd40b4d3c94ad72f7fc7039db8e3 (diff) | |
| download | linux-0ae89beb283a0db5980d1d4781c7d7be2f2810d6.tar.gz linux-0ae89beb283a0db5980d1d4781c7d7be2f2810d6.tar.bz2 linux-0ae89beb283a0db5980d1d4781c7d7be2f2810d6.zip | |
can: add destructor for self generated skbs
Self generated skbuffs in net/can/bcm.c are setting a skb->sk reference but
no explicit destructor which is enforced since Linux 3.11 with commit
376c7311bdb6 (net: add a temporary sanity check in skb_orphan()).
This patch adds some helper functions to make sure that a destructor is
properly defined when a sock reference is assigned to a CAN related skb.
To create an unshared skb owned by the original sock a common helper function
has been introduced to replace open coded functions to create CAN echo skbs.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Andre Naujoks <nautsch2@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/can/janz-ican3.c')
| -rw-r--r-- | drivers/net/can/janz-ican3.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c index e24e6690d672..2124c6790687 100644 --- a/drivers/net/can/janz-ican3.c +++ b/drivers/net/can/janz-ican3.c @@ -18,6 +18,7 @@ #include <linux/netdevice.h> #include <linux/can.h> #include <linux/can/dev.h> +#include <linux/can/skb.h> #include <linux/can/error.h> #include <linux/mfd/janz.h> @@ -1133,20 +1134,9 @@ static void ican3_handle_message(struct ican3_dev *mod, struct ican3_msg *msg) */ static void ican3_put_echo_skb(struct ican3_dev *mod, struct sk_buff *skb) { - struct sock *srcsk = skb->sk; - - if (atomic_read(&skb->users) != 1) { - struct sk_buff *old_skb = skb; - - skb = skb_clone(old_skb, GFP_ATOMIC); - kfree_skb(old_skb); - if (!skb) - return; - } else { - skb_orphan(skb); - } - - skb->sk = srcsk; + skb = can_create_echo_skb(skb); + if (!skb) + return; /* save this skb for tx interrupt echo handling */ skb_queue_tail(&mod->echoq, skb); |