bna: Eliminate Small Race Condition Window in RX Path

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Change details:
 - In a continuous sequence of ifconfig up/down operations, there is a small
   window of race between bnad_set_rx_mode() and bnad_cleanup_rx() while the
   former tries to access rx_info->rx & the latter sets it to NULL. This race
   could lead to bna_rx_mode_set() being called with a NULL (rx_info->rx)
   pointer and a crash.
 - Hold bnad->bna_lock while setting / unsetting rx_info->rx in bnad_setup_rx()
   & bnad_cleanup_rx(), thereby eliminating the race described above.

Signed-off-by: Gurunatha Karaje <gkaraje@brocade.com>
Signed-off-by: Rasesh Mody <rmody@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Rasesh Mody 2011-09-16 15:06:48 +00:00 • committed by David S. Miller

parent 3fb9852f98

commit b9fa1fbf98

1 changed files with 3 additions and 2 deletions

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drivers/net/ethernet/brocade/bna/bnad.c

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