4.4-stable review patch. If anyone has any objections, please let me know.
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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,