linux-kernel - [PATCH 02/11] bcache: Fix a dumb journal discard bug

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Message-Id: <1380003456-19938-3-git-send-email-kmo@daterainc.com>
Date:	Mon, 23 Sep 2013 23:17:27 -0700
From:	Kent Overstreet <kmo@...erainc.com>
To:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-bcache@...r.kernel.org
Cc:	axboe@...nel.dk, Kent Overstreet <kmo@...erainc.com>,
	stable@...r.kernel.org
Subject: [PATCH 02/11] bcache: Fix a dumb journal discard bug

That switch statement was obviously wrong, leading to some sort of weird
spinning on rare occasion with discards enabled...

Signed-off-by: Kent Overstreet <kmo@...erainc.com>
Cc: linux-stable <stable@...r.kernel.org> # >= v3.10
---
 drivers/md/bcache/journal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index ba95ab8..c0017ca 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -428,7 +428,7 @@ static void do_journal_discard(struct cache *ca)
 		return;
 	}
 
-	switch (atomic_read(&ja->discard_in_flight) == DISCARD_IN_FLIGHT) {
+	switch (atomic_read(&ja->discard_in_flight)) {
 	case DISCARD_IN_FLIGHT:
 		return;
 
-- 
1.8.4.rc3

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