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dm integrity: fix to not disable/enable interrupts from interrupt context 

Use spin_lock_irqsave and spin_unlock_irqrestore rather than
spin_{lock,unlock}_irq in submit_flush_bio().

Otherwise lockdep issues the following warning:
  DEBUG_LOCKS_WARN_ON(current->hardirq_context)
  WARNING: CPU: 1 PID: 0 at kernel/locking/lockdep.c:2748 trace_hardirqs_on_caller+0x107/0x180

Reported-by: Ondrej Kozina <okozina@redhat.com>
Tested-by: Ondrej Kozina <okozina@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Mike Snitzer 2017-06-19 10:55:47 -04:00
parent cd15fb64ee
commit 7def52b78a
1 changed files with 5 additions and 2 deletions
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7
drivers/md/dm-integrity.c
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@ -1105,10 +1105,13 @@ static void schedule_autocommit(struct dm_integrity_c *ic)
static void submit_flush_bio(struct dm_integrity_c *ic, struct dm_integrity_io *dio)
{
struct bio *bio;
spin_lock_irq(&ic->endio_wait.lock);
unsigned long flags;
spin_lock_irqsave(&ic->endio_wait.lock, flags);
bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
bio_list_add(&ic->flush_bio_list, bio);
spin_unlock_irq(&ic->endio_wait.lock);
spin_unlock_irqrestore(&ic->endio_wait.lock, flags);
queue_work(ic->commit_wq, &ic->commit_work);
}