From 66bc600363acd0acae84e878e5a06e7b7a38c014 Mon Sep 17 00:00:00 2001 From: Philip J Kelleher Date: Tue, 18 Jun 2013 14:46:04 -0500 Subject: [PATCH] rsxx: Fixes DLPAR add kernel panic if partition still mounted. A kernel panic would occur on a DLPAR add if there was a partition still mounted during the DLPAR remove. This bug fix will allow the user to unmount the partition and bring the driver back into a good state after the DLPAR add. Signed-off-by: Philip J Kelleher Signed-off-by: Jens Axboe --- drivers/block/rsxx/dev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c index 1fa7ccc..a092f58 100644 --- a/drivers/block/rsxx/dev.c +++ b/drivers/block/rsxx/dev.c @@ -171,6 +171,9 @@ static void rsxx_make_request(struct request_queue *q, struct bio *bio) might_sleep(); + if (!card) + goto req_err; + if (unlikely(card->halt)) { st = -EFAULT; goto req_err; @@ -331,6 +334,7 @@ void rsxx_destroy_dev(struct rsxx_cardinfo *card) card->gendisk = NULL; blk_cleanup_queue(card->queue); + card->queue->queuedata = NULL; unregister_blkdev(card->major, DRIVER_NAME); } -- 2.7.4