From: Stefan Haberland <stefan.haberland@de.ibm.com>
Date: Tue, 30 Jul 2013 08:49:43 +0000 (+0200)
Subject: s390/dasd: fix hanging devices after path events
X-Git-Tag: firefly_0821_release~176^2~5594^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0e003b709ef9f4c43f6338834526c3556ea71b19;p=firefly-linux-kernel-4.4.55.git

s390/dasd: fix hanging devices after path events

The processing of the dasd_block tasklet may have been interrupted
by a path event.
Restart the dasd tasklets in sleep_on_immediately function.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 17150a778984..451bf99582ff 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2392,6 +2392,12 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
 		rc = cqr->intrc;
 	else
 		rc = -EIO;
+
+	/* kick tasklets */
+	dasd_schedule_device_bh(device);
+	if (device->block)
+		dasd_schedule_block_bh(device->block);
+
 	return rc;
 }