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[BUGFIX,IMPROVEMENT,04/14] block, bfq: remove case of redirected bic from insert_request

Message ID 20190129110638.12652-5-paolo.valente@linaro.org
State Accepted
Commit 03e565e4204c6cf8687d995de5cafd0341503b4e
Headers show
Series batch of patches for next linux release | expand

Commit Message

Paolo Valente Jan. 29, 2019, 11:06 a.m. UTC 
Before commit 18e5a57d7987 ("block, bfq: postpone rq preparation to
insert or merge"), the destination queue for a request was chosen by a
different hook than the one that then inserted the request. So,
between the execution of the two hooks, the bic of the process
generating the request could happen to be redirected to a different
bfq_queue. As a consequence, the destination bfq_queue stored in the
request could be wrong. Such an event does not need to ba handled any
longer.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>

---
 block/bfq-iosched.c | 2 --
 1 file changed, 2 deletions(-)

-- 
2.20.1
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Patch

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index b0e8006475be..a9275ed57726 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -4633,8 +4633,6 @@  static bool __bfq_insert_request(struct bfq_data *bfqd, struct request *rq)
 	bool waiting, idle_timer_disabled = false;
 
 	if (new_bfqq) {
-		if (bic_to_bfqq(RQ_BIC(rq), 1) != bfqq)
-			new_bfqq = bic_to_bfqq(RQ_BIC(rq), 1);
 		/*
 		 * Release the request's reference to the old bfqq
 		 * and make sure one is taken to the shared queue.