This is a note to let you know that I've just added the patch titled
s390/dasd: fix wrongly assigned configuration data
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: s390-dasd-fix-wrongly-assigned-configuration-data.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Feb 28 16:19:30 CET 2018
From: Stefan Haberland sth@linux.vnet.ibm.com Date: Wed, 6 Dec 2017 10:30:39 +0100 Subject: s390/dasd: fix wrongly assigned configuration data
From: Stefan Haberland sth@linux.vnet.ibm.com
[ Upstream commit 8a9bd4f8ebc6800bfc0596e28631ff6809a2f615 ]
We store per path and per device configuration data to identify the path or device correctly. The per path configuration data might get mixed up if the original request gets into error recovery and is started with a random path mask.
This would lead to a wrong identification of a path in case of a CUIR event for example.
Fix by copying the path mask from the original request to the error recovery request in case it is a path verification request.
Signed-off-by: Stefan Haberland sth@linux.vnet.ibm.com Reviewed-by: Jan Hoeppner hoeppner@linux.vnet.ibm.com Signed-off-by: Martin Schwidefsky schwidefsky@de.ibm.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/s390/block/dasd_3990_erp.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
--- a/drivers/s390/block/dasd_3990_erp.c +++ b/drivers/s390/block/dasd_3990_erp.c @@ -2743,6 +2743,16 @@ dasd_3990_erp_action(struct dasd_ccw_req erp = dasd_3990_erp_handle_match_erp(cqr, erp); }
+ + /* + * For path verification work we need to stick with the path that was + * originally chosen so that the per path configuration data is + * assigned correctly. + */ + if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) { + erp->lpm = cqr->lpm; + } + if (device->features & DASD_FEATURE_ERPLOG) { /* print current erp_chain */ dev_err(&device->cdev->dev,
Patches currently in stable-queue which might be from sth@linux.vnet.ibm.com are
queue-4.4/s390-dasd-fix-wrongly-assigned-configuration-data.patch