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authorStefan Haberland <stefan.haberland@de.ibm.com>2012-11-27 20:04:14 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-11-30 18:40:42 +0400
commit55d3a85cd2fa3274a6dfa0901a3be342b433bfa0 (patch)
treed7a221195cf2d61b7d542873e00e6f84982e9664 /drivers/s390
parent683c3dcef439f969b2c7fd09b60144cb4e2155a5 (diff)
downloadlinux-55d3a85cd2fa3274a6dfa0901a3be342b433bfa0.tar.xz
s390/dasd: fix unaccessible device after resume
If a channel path is cabled incorrectly and the device is suspended and resumed the device may be inaccessible afterwards. Make the path connection check not interrupt the resume callback there could be other valid paths available. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Reference-ID: RQM 1262 Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dasd_eckd.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 705b1829b8f8..806fe912d6e7 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1026,7 +1026,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
{
void *conf_data;
int conf_len, conf_data_saved;
- int rc;
+ int rc, path_err;
__u8 lpm, opm;
struct dasd_eckd_private *private, path_private;
struct dasd_path *path_data;
@@ -1037,6 +1037,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
path_data = &device->path_data;
opm = ccw_device_get_path_mask(device->cdev);
conf_data_saved = 0;
+ path_err = 0;
/* get configuration data per operational path */
for (lpm = 0x80; lpm; lpm>>= 1) {
if (!(lpm & opm))
@@ -1122,7 +1123,8 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
"the same device, path %02X leads to "
"device %s instead of %s\n", lpm,
print_path_uid, print_device_uid);
- return -EINVAL;
+ path_err = -EINVAL;
+ continue;
}
path_private.conf_data = NULL;
@@ -1142,7 +1144,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
kfree(conf_data);
}
- return 0;
+ return path_err;
}
static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
@@ -4159,9 +4161,7 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
private = (struct dasd_eckd_private *) device->private;
/* Read Configuration Data */
- rc = dasd_eckd_read_conf(device);
- if (rc)
- goto out_err;
+ dasd_eckd_read_conf(device);
dasd_eckd_get_uid(device, &temp_uid);
/* Generate device unique id */
@@ -4181,9 +4181,7 @@ static int dasd_eckd_restore_device(struct dasd_device *device)
dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST);
/* RE-Read Configuration Data */
- rc = dasd_eckd_read_conf(device);
- if (rc)
- goto out_err;
+ dasd_eckd_read_conf(device);
/* Read Feature Codes */
dasd_eckd_read_features(device);