Commit 48769695 authored May 13, 2015 by Shaohua Li Committed by NeilBrown May 21, 2015

raid5: fix broken async operation chain



ops_run_reconstruct6() doesn't correctly chain asyn operations. The tx returned
by async_gen_syndrome should be added as the dependent tx of next stripe.

The issue is introduced by commit 59fc630b
    RAID5: batch adjacent full stripe write

Reported-and-tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent bb27051f

drivers/md/raid5.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1822,7 +1822,7 @@ ops_run_reconstruct6(struct stripe_head sh, struct raid5_percpu percpu,
		} else
		init_async_submit(&submit, 0, tx, NULL, NULL,
		to_addr_conv(sh, percpu, j));
		async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
		tx = async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
		if (!last_stripe) {
		j++;
		sh = list_first_entry(&sh->batch_list, struct stripe_head,