[PATCH 7/11] rsxx: Fixes DLPAR add kernel panic if partition stillmounted.

From: Philip J. Kelleher
Date: Tue Jun 18 2013 - 15:47:20 EST

From: Philip J Kelleher <pjk1939@xxxxxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxxxxx>

diff -uprN -X linux-block-vanilla/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/dev.c linux-block/drivers/block/rsxx/dev.c
--- linux-block-vanilla/drivers/block/rsxx/dev.c 2013-06-18 09:27:54.997977479 -0500
+++ linux-block/drivers/block/rsxx/dev.c 2013-06-18 09:38:35.997839384 -0500
@@ -171,6 +171,9 @@ static void rsxx_make_request(struct req


+ if (!card)
+ goto req_err;
if (unlikely(card->halt)) {
st = -EFAULT;
goto req_err;
@@ -331,6 +334,7 @@ void rsxx_destroy_dev(struct rsxx_cardin
card->gendisk = NULL;

+ card->queue->queuedata = NULL;
unregister_blkdev(card->major, DRIVER_NAME);

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