diff options
| author | NeilBrown <neilb@suse.de> | 2012-10-11 13:44:30 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-10-11 13:44:30 +1100 |
| commit | 7ad4d4a68a1a19f21c7b39cb3f51bf17fba6e3d0 (patch) | |
| tree | 9a93ab26f6354988241dc003a9ab16b77a3d75d3 | |
| parent | fd177481b440c3f7b5ee9b821a76b29fdf2a6712 (diff) | |
md/raid1: Don't release reference to device while handling read error.
When we get a read error, we arrange for raid1d to handle it.
Currently we release the reference on the device. This can result
in
conf->mirrors[read_disk].rdev
being NULL in fix_read_error, if the device happens to get removed
before the read error is handled.
So instead keep the reference until the read error has been fully
handled.
Reported-by: hank <pyu@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/raid1.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 55ccf473053..e913356b257 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -333,9 +333,10 @@ static void raid1_end_read_request(struct bio *bio, int error) spin_unlock_irqrestore(&conf->device_lock, flags); } - if (uptodate) + if (uptodate) { raid_end_bio_io(r1_bio); - else { + rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev); + } else { /* * oops, read error: */ @@ -349,9 +350,8 @@ static void raid1_end_read_request(struct bio *bio, int error) (unsigned long long)r1_bio->sector); set_bit(R1BIO_ReadError, &r1_bio->state); reschedule_retry(r1_bio); + /* don't drop the reference on read_disk yet */ } - - rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev); } static void close_write(struct r1bio *r1_bio) @@ -2229,6 +2229,7 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio) unfreeze_array(conf); } else md_error(mddev, conf->mirrors[r1_bio->read_disk].rdev); + rdev_dec_pending(conf->mirrors[r1_bio->read_disk].rdev, conf->mddev); bio = r1_bio->bios[r1_bio->read_disk]; bdevname(bio->bi_bdev, b); |