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Commit a3147a7b authored by Stefan Haberland's avatar Stefan Haberland Committed by Martin Schwidefsky
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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: default avatarStefan Haberland <stefan.haberland@de.ibm.com>
Reference-ID: RQM 2520
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent f2608cd4

drivers/s390/block/dasd.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -2527,6 +2527,11 @@ static void __dasd_process_request_queue(struct dasd_block *block) 
			__blk_end_request_all(req, -EIO);

			__blk_end_request_all(req, -EIO);

		return;

		return;

	}

	}



	/* if device ist stopped do not fetch new requests */

	if (basedev->stopped)

		return;



	/* Now we try to fetch requests from the request queue */

	/* Now we try to fetch requests from the request queue */

	while ((req = blk_peek_request(queue))) {

	while ((req = blk_peek_request(queue))) {

		if (basedev->features & DASD_FEATURE_READONLY &&

		if (basedev->features & DASD_FEATURE_READONLY &&