Merge tag 'for-5.15/block-2021-08-30' of git://git.kernel.dk/linux-block

[linux-2.6-microblaze.git] / drivers / s390 / block / dasd_eckd.c

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 8610ea4..460e0f1 100644 (file)
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1004,15 +1004,23 @@ static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
 static void dasd_eckd_store_conf_data(struct dasd_device *device,
                                      struct dasd_conf_data *conf_data, int chp)
 {
+       struct dasd_eckd_private *private = device->private;
        struct channel_path_desc_fmt0 *chp_desc;
        struct subchannel_id sch_id;
+       void *cdp;
 
-       ccw_device_get_schid(device->cdev, &sch_id);
        /*
         * path handling and read_conf allocate data
         * free it before replacing the pointer
+        * also replace the old private->conf_data pointer
+        * with the new one if this points to the same data
         */
-       kfree(device->path[chp].conf_data);
+       cdp = device->path[chp].conf_data;
+       if (private->conf_data == cdp) {
+               private->conf_data = (void *)conf_data;
+               dasd_eckd_identify_conf_parts(private);
+       }
+       ccw_device_get_schid(device->cdev, &sch_id);
        device->path[chp].conf_data = conf_data;
        device->path[chp].cssid = sch_id.cssid;
        device->path[chp].ssid = sch_id.ssid;
@@ -1020,6 +1028,7 @@ static void dasd_eckd_store_conf_data(struct dasd_device *device,
        if (chp_desc)
                device->path[chp].chpid = chp_desc->chpid;
        kfree(chp_desc);
+       kfree(cdp);
 }
 
 static void dasd_eckd_clear_conf_data(struct dasd_device *device)