cxgb4: Avoids race and deadlock while freeing tx descriptor

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There could be race between t4_eth_xmit() and t4_free_sge_resources() while
freeing tx descriptors, take txq lock in t4_free_sge_resources(). We need
to stop the xmit frame path which runs in bottom half context while
unloading the driver using _bh variant of the lock. This is to prevent
the deadlock between xmit and driver unload.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Hariprasad Shenai 2016-04-26 20:10:24 +05:30 • committed by David S. Miller

parent ed98c85ee9

commit fbe8077687

1 changed files with 2 additions and 0 deletions

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drivers/net/ethernet/chelsio/cxgb4/sge.c

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