From df3044f1ef002c2269b11cb76a1b2bec629732b4 Mon Sep 17 00:00:00 2001 From: Stefan Haberland Date: Thu, 2 Apr 2015 13:18:39 +0200 Subject: [PATCH] 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 Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index a5ed35d..57fd663 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; -- 2.7.4