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(parent: 1fadee0) | patch
fm10k: fix race accessing page->_count
authorEric Dumazet <edumazet@google.com>
Fri, 10 Oct 2014 11:48:14 +0000 (04:48 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 10 Oct 2014 19:37:28 +0000 (15:37 -0400)
commit42b0270b40e2ad692ef59e28233202ee6f293e1e
tree69d6d03af07645ea074a68433d24b2bf3ace9f22tree | snapshot
parent1fadee0c364572f2b2e098b34001fbaa82ee2e00commit | diff
fm10k: fix race accessing page->_count

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>
drivers/net/ethernet/intel/fm10k/fm10k_main.c diff | blob | history
Domain: System / Kernel;