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authorAsai Thambi S P <asamymuthupa@micron.com>2013-01-11 18:47:12 +0530
committerJens Axboe <axboe@kernel.dk>2013-01-11 14:35:58 +0100
commit58c49df378cde4ff64172483d593a1a5689c13a8 (patch)
tree561681531660ae0f29ecc286cf921ab48ee11f2a /drivers/block
parent47cd4b3c7e80cc8d5ac82930c5af835870b5aba1 (diff)
mtip32xx: fix for crash when the device surprise removed during rebuild
When rebuild is in progress, disk->queue is yet to be created. Surprise removing the device will call remove()-> del_gendisk(). del_gendisk() expect disk->queue be not NULL. Fix is to call put_disk() when disk_queue is NULL. Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index b93282019632..3fd100990453 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3888,7 +3888,12 @@ static int mtip_block_remove(struct driver_data *dd)
* Delete our gendisk structure. This also removes the device
* from /dev
*/
- del_gendisk(dd->disk);
+ if (dd->disk) {
+ if (dd->disk->queue)
+ del_gendisk(dd->disk);
+ else
+ put_disk(dd->disk);
+ }
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
@@ -3922,7 +3927,13 @@ static int mtip_block_shutdown(struct driver_data *dd)
"Shutting down %s ...\n", dd->disk->disk_name);
/* Delete our gendisk structure, and cleanup the blk queue. */
- del_gendisk(dd->disk);
+ if (dd->disk) {
+ if (dd->disk->queue)
+ del_gendisk(dd->disk);
+ else
+ put_disk(dd->disk);
+ }
+
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);