tree 09d60b2da7bc9ac8d7179ee18d100a48b9a126a4
parent 1862ee22ce2e28087299aebb6556a5cdc122d0ef
author Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> 1423629073 +1030
committer Rusty Russell <rusty@rustcorp.com.au> 1423629194 +1030

virtio: Avoid possible kernel panic if DEBUG is enabled.

The virtqueue_add() calls START_USE() upon entry. The virtqueue_kick() is
called if vq->num_added == (1 << 16) - 1 before calling END_USE().
The virtqueue_kick_prepare() called via virtqueue_kick() calls START_USE()
upon entry, and will call panic() if DEBUG is enabled.
Move this virtqueue_kick() call to after END_USE() call.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>