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Date: Fri, 11 Jan 2013 18:47:12 +0530 From: Asai Thambi S P <asamymuthupa@...ron.com> To: Jens Axboe <axboe@...nel.dk> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Sam Bradshaw" <sbradshaw@...ron.com>, "Selvan Mani (smani) [CONT - Type 2]" <smani@...ron.com> Subject: [PATCH 3/3] 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@...ron.com> --- drivers/block/mtip32xx/mtip32xx.c | 15 +++++++++++++-- 1 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index a070a68..cfe65cf 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -3967,7 +3967,12 @@ 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); @@ -4001,7 +4006,13 @@ 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); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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