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authorStefan Weinhuber <wein@de.ibm.com>2008-02-05 16:50:47 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-02-05 16:51:00 +0100
commitfe6b8e76d920b93fd445382aff7ff24082af8874 (patch)
tree1b7d18d66c30e346c21ffa1b851487f10dd4378e /drivers/s390/block
parent6c5f57c7884a7e0806ae9af86de243321cab4953 (diff)
downloadop-kernel-dev-fe6b8e76d920b93fd445382aff7ff24082af8874.zip
op-kernel-dev-fe6b8e76d920b93fd445382aff7ff24082af8874.tar.gz
[S390] dasd: fix panic caused by alias device offline
When an alias device is set offline while it is in use this may result in a panic in the cleanup part of the dasd_block_tasklet. The problem here is that there may exist some ccw requests that were originally created for the alias device and transferred to the base device when the alias was set offline. When these request are cleaned up later, the discipline pointer in the alias device may not be valid anymore. To fix this use the base device discipline to find the cleanup function. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block')
-rw-r--r--drivers/s390/block/dasd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index ab4f64c..d984e0f 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1706,7 +1706,7 @@ static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr)
req = (struct request *) cqr->callback_data;
dasd_profile_end(cqr->block, cqr, req);
- status = cqr->memdev->discipline->free_cp(cqr, req);
+ status = cqr->block->base->discipline->free_cp(cqr, req);
if (status <= 0)
error = status ? status : -EIO;
dasd_end_request(req, error);
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