IB/rxe: Move refcounting earlier in rxe_send()

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The network stack will call nskb's destructor, rxe_skb_tx_dtor(), if the
packet gets dropped by ip_local_out()/ip6_local_out(). Thus we need to add
the QP ref before output to avoid extra dereferences during network
congestion. This could lead to unwanted destruction of the QP.

Fix up the skb_out accounting, too.

Fixes: fda85ce912 ("IB/rxe: Fix kernel panic from skb destructor")
Signed-off-by: Andrew Boyer <andrew.boyer@dell.com>
Acked-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Andrew Boyer 2017-08-28 16:11:49 -04:00 • committed by Doug Ledford

parent 0208da90de

commit 9eb7f8e44d

1 changed files with 5 additions and 3 deletions

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drivers/infiniband/sw/rxe/rxe_net.c

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