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lightnvm: pblk: warn in case of corrupted write buffer

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When cleaning up buffer entries as we wrap up, their state should be
"completed". If any of the entries is in "submitted" state, it means
that something bad has happened. Trigger a warning immediately instead of
waiting for the state flag to eventually be updated, thus hiding the
issue.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González 2018-06-01 15:04:19 +02:00 committed by Jens Axboe
parent 03a34b2d25
commit e37d07983a
1 changed files with 2 additions and 3 deletions
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5
drivers/lightnvm/pblk-rb.c
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@ -142,10 +142,9 @@ static void clean_wctx(struct pblk_w_ctx *w_ctx)
{
int flags;
try:
flags = READ_ONCE(w_ctx->flags);
if (!(flags & PBLK_SUBMITTED_ENTRY))
goto try;
WARN_ONCE(!(flags & PBLK_SUBMITTED_ENTRY),
"pblk: overwriting unsubmitted data\n");
/* Release flags on context. Protect from writes and reads */
smp_store_release(&w_ctx->flags, PBLK_WRITABLE_ENTRY);