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[S390] cio: add message for timeouts on internal I/O 

Print a message in case we do not receive an IRQ in time (for internal
I/O). Also print the ID of the last used channel path, since it is
possible that not the device itself but this specific path might have
a defect.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2011-10-30 15:16:34 +01:00 committed by Martin Schwidefsky
parent 017ec18360
commit 75a1c61b43
1 changed files with 20 additions and 3 deletions
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23
drivers/s390/cio/ccwreq.c
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@ -1,10 +1,13 @@
/*
* Handling of internal CCW device requests.
*
* Copyright IBM Corp. 2009
* Copyright IBM Corp. 2009, 2011
* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h>
#include <linux/err.h>
#include <asm/ccwdev.h>
@ -323,7 +326,21 @@ void ccw_request_timeout(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
struct ccw_request *req = &cdev->private->req;
int rc;
int rc = -ENODEV, chp;
if (cio_update_schib(sch))
goto err;
for (chp = 0; chp < 8; chp++) {
if ((0x80 >> chp) & sch->schib.pmcw.lpum)
pr_warning("%s: No interrupt was received within %lus "
"(CS=%02x, DS=%02x, CHPID=%x.%02x)\n",
dev_name(&cdev->dev), req->timeout / HZ,
scsw_cstat(&sch->schib.scsw),
scsw_dstat(&sch->schib.scsw),
sch->schid.cssid,
sch->schib.pmcw.chpid[chp]);
}
if (!ccwreq_next_path(cdev)) {
/* set the final return code for this request */
@ -342,7 +359,7 @@ err:
* ccw_request_notoper - notoper handler for I/O request procedure
* @cdev: ccw device
*
* Handle timeout during I/O request procedure.
* Handle notoper during I/O request procedure.
*/
void ccw_request_notoper(struct ccw_device *cdev)
{