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be2net: Fix race in posting rx buffers. 

There is a possibility of be_post_rx_frags() being called simultaneously from
both be_worker() (when rx_post_starved) and be_poll_rx() (when rxq->used is 0).
This can be avoided by posting rx buffers only when some completions have been
reaped.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sathya Perla 2011-08-22 19:41:51 +00:00 committed by David S. Miller
parent ec5efe7946
commit 857c99059e
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/emulex/benet/be_main.c
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@ -1862,7 +1862,7 @@ static int be_poll_rx(struct napi_struct *napi, int budget)
}
/* Refill the queue */
if (atomic_read(&rxo->q.used) < RX_FRAGS_REFILL_WM)
if (work_done && atomic_read(&rxo->q.used) < RX_FRAGS_REFILL_WM)
be_post_rx_frags(rxo, GFP_ATOMIC);
/* All consumed */