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| author | Vladislav Zolotarov <vladz@broadcom.com> | 2010-02-28 00:12:02 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-28 18:37:12 -0800 |
| commit | c16cc0b464b8876cfd57ce1c1dbcb6f9a6a0bce3 (patch) | |
| tree | 8f70b0b1a48a5e9e2ad44d7d446936a75a936215 /arch/x86/kernel/tsc.c | |
| parent | 76dadd76c265a0cdb5a76aa4eef03fcc9639b388 (diff) | |
| download | op-kernel-dev-c16cc0b464b8876cfd57ce1c1dbcb6f9a6a0bce3.zip op-kernel-dev-c16cc0b464b8876cfd57ce1c1dbcb6f9a6a0bce3.tar.gz | |
bnx2x: Tx barriers and locks
[Resending with the proper subject. Sorry for the mess. ]
This patch is based on the RFC of Stanislaw Gruszka.
More specifically it fixes two possible races:
- One, described by Stanislaw, may lead to permanent disabling of the Tx
queue.
This is fixed by adding the smp_wmb() to propagate the BD consumer
change towards the memory.
- Second may lead to bnx2x_start_xmit() returning NETDEV_TX_BUSY.
This is fixed by taking a tx_lock() before rechecking the number of
available Tx BDs.
thanks,
vlad
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/x86/kernel/tsc.c')
0 files changed, 0 insertions, 0 deletions
