From: Stefan Weinhuber <wein@de.ibm.com>
Date: Thu, 15 May 2008 14:52:36 +0000 (+0200)
Subject: [S390] dasd: fix timeout handling in interrupt handler
X-Git-Tag: v2.6.26-rc3~31^2~3
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f16f5843507ceaea315dae82b9fee29a65b72f24;p=linux-2.6

[S390] dasd: fix timeout handling in interrupt handler

When the dasd_int_handler is called with an error code instead of
an irb, the associated request should be restarted. This handling
was missing from the -ETIMEDOUT case. In fact it should be done in
any case.

Signed-off-by: Stefan Weinhuber <wein@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 ac6d4d3218..8ba3f135da 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -925,6 +925,8 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 	struct dasd_ccw_req *cqr;
 	struct dasd_device *device;
 
+	if (!intparm)
+		return;
 	cqr = (struct dasd_ccw_req *) intparm;
 	if (cqr->status != DASD_CQR_IN_IO) {
 		MESSAGE(KERN_DEBUG,
@@ -976,17 +978,16 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	if (IS_ERR(irb)) {
 		switch (PTR_ERR(irb)) {
 		case -EIO:
-			dasd_handle_killed_request(cdev, intparm);
 			break;
 		case -ETIMEDOUT:
 			printk(KERN_WARNING"%s(%s): request timed out\n",
 			       __func__, cdev->dev.bus_id);
-			//FIXME - dasd uses own timeout interface...
 			break;
 		default:
 			printk(KERN_WARNING"%s(%s): unknown error %ld\n",
 			       __func__, cdev->dev.bus_id, PTR_ERR(irb));
 		}
+		dasd_handle_killed_request(cdev, intparm);
 		return;
 	}