From a3147a7bc266df39b4f471ee7c4c9adcb56d29a6 Mon Sep 17 00:00:00 2001
From: Stefan Haberland <stefan.haberland@de.ibm.com>
Date: Thu, 2 Apr 2015 12:52:41 +0200
Subject: [PATCH] s390/dasd: fix unresumed device after suspend/resume
The DASD device driver only has a limited amount of memory to build
I/O requests.
This memory was used by blocklayer requests leading to an inability
to build needed internal requests to resume the device.
Fix by preventing the DASD driver to fetch requests for a stopped
device.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Reference-ID: RQM 2520
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
drivers/s390/block/dasd.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index cd57857a1c84..a5ed35d0cbf3 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2527,6 +2527,11 @@ static void __dasd_process_request_queue(struct dasd_block *block)
__blk_end_request_all(req, -EIO);
return;
}
+
+ /* if device ist stopped do not fetch new requests */
+ if (basedev->stopped)
+ return;
+
/* Now we try to fetch requests from the request queue */
while ((req = blk_peek_request(queue))) {
if (basedev->features & DASD_FEATURE_READONLY &&
--
2.30.9