rq_timed_out_fn might have been unset while the request
was in flight, so we need to check for it in blk_rq_timed_out().

Cc: Jens Axboe <ax...@kernel.dk>
Signed-off-by: Hannes Reinecke <h...@suse.de>
---
 block/blk-timeout.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 6e4744c..65f1035 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -82,9 +82,10 @@ void blk_delete_timer(struct request *req)
 static void blk_rq_timed_out(struct request *req)
 {
        struct request_queue *q = req->q;
-       enum blk_eh_timer_return ret;
+       enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER;
 
-       ret = q->rq_timed_out_fn(req);
+       if (q->rq_timed_out_fn)
+               ret = q->rq_timed_out_fn(req);
        switch (ret) {
        case BLK_EH_HANDLED:
                __blk_complete_request(req);
-- 
1.7.4.2

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