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authorPhilip J Kelleher <pjk1939@linux.vnet.ibm.com>2013-06-18 14:46:04 -0500
committerJens Axboe <axboe@kernel.dk>2013-06-19 13:52:09 +0200
commit66bc600363acd0acae84e878e5a06e7b7a38c014 (patch)
treea5e0b7bfcb3e178b60b91ca8d4beeca717d24126 /drivers/block/rsxx
parentf730e3dc6dc4698d55fd9bf6de33a5436900e9bd (diff)
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 <pjk1939@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/rsxx')
-rw-r--r--drivers/block/rsxx/dev.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c
index 1fa7cccd6866..a092f58db212 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);
}