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Date: Thu, 9 Oct 2014 14:02:34 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: NeilBrown <neilb@...e.de>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13 129/163] md/raid1: intialise start_next_window for READ case to avoid hang 3.13.11.9 -stable review patch. If anyone has any objections, please let me know. ------------------ From: NeilBrown <neilb@...e.de> commit f0cc9a057151892b885be21a1d19b0185568281d upstream. r1_bio->start_next_window is not initialised in the READ case, so allow_barrier may incorrectly decrement conf->current_window_requests which can cause raise_barrier() to block forever. Fixes: 79ef3a8aa1cb1523cc231c9a90a278333c21f761 Reported-by: Brassow Jonathan <jbrassow@...hat.com> Signed-off-by: NeilBrown <neilb@...e.de> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/md/raid1.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index f4d5e52..b806da4 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1187,6 +1187,7 @@ read_again: atomic_read(&bitmap->behind_writes) == 0); } r1_bio->read_disk = rdisk; + r1_bio->start_next_window = 0; read_bio = bio_clone_mddev(bio, GFP_NOIO, mddev); bio_trim(read_bio, r1_bio->sector - bio->bi_sector, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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