From 58c49df378cde4ff64172483d593a1a5689c13a8 Mon Sep 17 00:00:00 2001 From: Asai Thambi S P Date: Fri, 11 Jan 2013 18:47:12 +0530 Subject: [PATCH] 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 Signed-off-by: Jens Axboe --- drivers/block/mtip32xx/mtip32xx.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index b932820..3fd1009 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); -- 2.7.4