fm10k: fix race accessing page->_count

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This is illegal to use atomic_set(&page->_count, 2) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2014-10-10 04:48:14 -07:00 • committed by David S. Miller

parent 1fadee0c36

commit 42b0270b40

1 changed files with 3 additions and 4 deletions

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7

drivers/net/ethernet/intel/fm10k/fm10k_main.c

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