From a3147a7bc266df39b4f471ee7c4c9adcb56d29a6 Mon Sep 17 00:00:00 2001 From: Stefan Haberland 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 Reference-ID: RQM 2520 Signed-off-by: Martin Schwidefsky --- 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 && -- 2.20.1