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btrfs: don't check for btrfs_device::bdev in btrfs_end_bio

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btrfs_map_bio ensures that all submitted bios to devices have valid
btrfs_device::bdev so this check can be removed from btrfs_end_bio. This
check was added in june 2012 597a60fadedf ("Btrfs: don't count I/O
statistic read errors for missing devices") but then in October of the
same year another commit de1ee92ac3bc ("Btrfs: recheck bio against
block device when we map the bio") started checking for the presence of
btrfs_device::bdev before actually issuing the bio.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-07-02 15:23:31 +03:00 committed by David Sterba
parent c31efbdf23
commit 3eee86c8fd
1 changed files with 7 additions and 8 deletions
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15
fs/btrfs/volumes.c
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@ -6263,17 +6263,16 @@ static void btrfs_end_bio(struct bio *bio)
bio->bi_status == BLK_STS_TARGET) {
struct btrfs_device *dev = btrfs_io_bio(bio)->device;
if (dev->bdev) {
if (bio_op(bio) == REQ_OP_WRITE)
btrfs_dev_stat_inc_and_print(dev,
ASSERT(dev->bdev);
if (bio_op(bio) == REQ_OP_WRITE)
btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_WRITE_ERRS);
else if (!(bio->bi_opf & REQ_RAHEAD))
btrfs_dev_stat_inc_and_print(dev,
else if (!(bio->bi_opf & REQ_RAHEAD))
btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_READ_ERRS);
if (bio->bi_opf & REQ_PREFLUSH)
btrfs_dev_stat_inc_and_print(dev,
if (bio->bi_opf & REQ_PREFLUSH)
btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_FLUSH_ERRS);
}
}
}