s390/dasd: fix wrongly assigned configuration data

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>

diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index c94b606e0df8831e27a2c66a38ec19f43ad9a664..ee14d8e45c971863c6aef252ecbadba64d365826 100644 (file)
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -2803,6 +2803,16 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
                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,