]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mlx4: fix race accessing page->_count
authorEric Dumazet <edumazet@google.com>
Fri, 10 Oct 2014 11:48:17 +0000 (04:48 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 10 Oct 2014 19:37:28 +0000 (15:37 -0400)
commit98226208c8a1fe5834e92d827a2a1e8051a17943
tree09bc0b1ebf516dcba2d21b93d98dc0e3d2bc3181
parentec91698360b3818ff426488a1529811f7a7ab87f
mlx4: fix race accessing page->_count

This is illegal to use atomic_set(&page->_count, ...) 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>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/mellanox/mlx4/en_rx.c