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authorStefan Haberland <stefan.haberland@de.ibm.com>2015-04-02 13:18:39 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-04-15 12:23:51 +0200
commitdf3044f1ef002c2269b11cb76a1b2bec629732b4 (patch)
tree3356cb0811b7a128a837992f5d62522291643dc5 /drivers/s390/block/dasd.c
parenta3147a7bc266df39b4f471ee7c4c9adcb56d29a6 (diff)
s390/dasd: Fix unresumed device after suspend/resume having no paths
The DASD device driver prevents I/O from being started on stopped devices. This also prevented channel paths to be verified and so the device was unable to be resumed. Fix by allowing path verification requests on stopped devices. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd.c')
-rw-r--r--drivers/s390/block/dasd.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index a5ed35d0cbf3..57fd66357b95 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2166,18 +2166,22 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
cqr->intrc = -ENOLINK;
continue;
}
- /* Don't try to start requests if device is stopped */
- if (interruptible) {
- rc = wait_event_interruptible(
- generic_waitq, !(device->stopped));
- if (rc == -ERESTARTSYS) {
- cqr->status = DASD_CQR_FAILED;
- maincqr->intrc = rc;
- continue;
- }
- } else
- wait_event(generic_waitq, !(device->stopped));
-
+ /*
+ * Don't try to start requests if device is stopped
+ * except path verification requests
+ */
+ if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
+ if (interruptible) {
+ rc = wait_event_interruptible(
+ generic_waitq, !(device->stopped));
+ if (rc == -ERESTARTSYS) {
+ cqr->status = DASD_CQR_FAILED;
+ maincqr->intrc = rc;
+ continue;
+ }
+ } else
+ wait_event(generic_waitq, !(device->stopped));
+ }
if (!cqr->callback)
cqr->callback = dasd_wakeup_cb;