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dm: reduce code duplication in __map_bio

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Error path code (for handling DM_MAPIO_REQUEUE and DM_MAPIO_KILL) is
effectively identical.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2022-02-17 23:40:14 -05:00
parent d41e077ab6
commit 90a2326ede
1 changed files with 6 additions and 12 deletions
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18
drivers/md/dm.c
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@ -1180,20 +1180,14 @@ static void __map_bio(struct bio *clone)
submit_bio_noacct(clone);
break;
case DM_MAPIO_KILL:
if (unlikely(swap_bios_limit(ti, clone))) {
struct mapped_device *md = io->md;
up(&md->swap_bios_semaphore);
}
free_tio(clone);
dm_io_dec_pending(io, BLK_STS_IOERR);
break;
case DM_MAPIO_REQUEUE:
if (unlikely(swap_bios_limit(ti, clone))) {
struct mapped_device *md = io->md;
up(&md->swap_bios_semaphore);
}
if (unlikely(swap_bios_limit(ti, clone)))
up(&io->md->swap_bios_semaphore);
free_tio(clone);
dm_io_dec_pending(io, BLK_STS_DM_REQUEUE);
if (r == DM_MAPIO_KILL)
dm_io_dec_pending(io, BLK_STS_IOERR);
else
dm_io_dec_pending(io, BLK_STS_DM_REQUEUE);
break;
default:
DMWARN("unimplemented target map return value: %d", r);