[S390] dasd: enable prefix independent of pav support

[pandora-kernel.git] / drivers / s390 / block / dasd_eckd.c

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 0be7c15..abb2ec8 100644 (file)
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -24,7 +24,6 @@
 #include <asm/idals.h>
 #include <asm/ebcdic.h>
 #include <asm/io.h>
-#include <asm/todclk.h>
 #include <asm/uaccess.h>
 #include <asm/cio.h>
 #include <asm/ccwdev.h>
@@ -86,7 +85,8 @@ dasd_eckd_probe (struct ccw_device *cdev)
        int ret;
 
        /* set ECKD specific ccw-device options */
-       ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
+       ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
+                                    CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
        if (ret) {
                DBF_EVENT(DBF_WARNING,
                       "dasd_eckd_probe: could not set ccw-device options "
@@ -1012,9 +1012,9 @@ static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
        }
        psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
        psf_ssc_data->order = PSF_ORDER_SSC;
-       psf_ssc_data->suborder = 0x40;
+       psf_ssc_data->suborder = 0xc0;
        if (enable_pav) {
-               psf_ssc_data->suborder |= 0x88;
+               psf_ssc_data->suborder |= 0x08;
                psf_ssc_data->reserved[0] = 0x88;
        }
        ccw = cqr->cpaddr;
@@ -1090,6 +1090,15 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
        struct dasd_block *block;
        int is_known, rc;
 
+       if (!ccw_device_is_pathgroup(device->cdev)) {
+               dev_warn(&device->cdev->dev,
+                        "A channel path group could not be established\n");
+               return -EIO;
+       }
+       if (!ccw_device_is_multipath(device->cdev)) {
+               dev_info(&device->cdev->dev,
+                        "The DASD is not operating in multipath mode\n");
+       }
        private = (struct dasd_eckd_private *) device->private;
        if (!private) {
                private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
@@ -3216,6 +3225,7 @@ int dasd_eckd_restore_device(struct dasd_device *device)
        struct dasd_eckd_characteristics temp_rdc_data;
        int is_known, rc;
        struct dasd_uid temp_uid;
+       unsigned long flags;
 
        private = (struct dasd_eckd_private *) device->private;
 
@@ -3228,7 +3238,8 @@ int dasd_eckd_restore_device(struct dasd_device *device)
        rc = dasd_eckd_generate_uid(device, &private->uid);
        dasd_get_uid(device->cdev, &temp_uid);
        if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
-               dev_err(&device->cdev->dev, "The UID of the DASD has changed\n");
+               dev_err(&device->cdev->dev, "The UID of the DASD has "
+                       "changed\n");
        if (rc)
                goto out_err;
        dasd_set_uid(device->cdev, &private->uid);
@@ -3256,9 +3267,9 @@ int dasd_eckd_restore_device(struct dasd_device *device)
                          "device: %s", rc, dev_name(&device->cdev->dev));
                goto out_err;
        }
-       spin_lock(get_ccwdev_lock(device->cdev));
+       spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
        memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
-       spin_unlock(get_ccwdev_lock(device->cdev));
+       spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 
        /* add device to alias management */
        dasd_alias_add_device(device);