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[S390] cio: use exception-save stsch

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Using stsch on schids with ssid != 0 can lead to an operand
exception. Use stsch_err to handle potential exceptions
if we fail to reenable mss after hibernation.

Cc: <stable@kernel.org>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2010-04-22 17:17:05 +02:00 committed by Martin Schwidefsky
parent 889ee9556c
commit 8821d24cd2
3 changed files with 11 additions and 11 deletions
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2
drivers/s390/cio/chsc_sch.c
View File

@ -124,7 +124,7 @@ static int chsc_subchannel_prepare(struct subchannel *sch)
* since we don't have a way to clear the subchannel and
* cannot disable it with a request running.
*/
cc = stsch(sch->schid, &schib);
cc = stsch_err(sch->schid, &schib);
if (!cc && scsw_stctl(&schib.scsw))
return -EAGAIN;
return 0;

18
drivers/s390/cio/cio.c
View File

@ -361,7 +361,7 @@ int cio_commit_config(struct subchannel *sch)
struct schib schib;
int ccode, retry, ret = 0;
if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
if (stsch_err(sch->schid, &schib) || !css_sch_is_valid(&schib))
return -ENODEV;
for (retry = 0; retry < 5; retry++) {
@ -372,7 +372,7 @@ int cio_commit_config(struct subchannel *sch)
return ccode;
switch (ccode) {
case 0: /* successful */
if (stsch(sch->schid, &schib) ||
if (stsch_err(sch->schid, &schib) ||
!css_sch_is_valid(&schib))
return -ENODEV;
if (cio_check_config(sch, &schib)) {
@ -404,7 +404,7 @@ int cio_update_schib(struct subchannel *sch)
{
struct schib schib;
if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
if (stsch_err(sch->schid, &schib) || !css_sch_is_valid(&schib))
return -ENODEV;
memcpy(&sch->schib, &schib, sizeof(schib));
@ -771,7 +771,7 @@ cio_get_console_sch_no(void)
if (console_irq != -1) {
/* VM provided us with the irq number of the console. */
schid.sch_no = console_irq;
if (stsch(schid, &console_subchannel.schib) != 0 ||
if (stsch_err(schid, &console_subchannel.schib) != 0 ||
(console_subchannel.schib.pmcw.st != SUBCHANNEL_TYPE_IO) ||
!console_subchannel.schib.pmcw.dnv)
return -1;
@ -863,10 +863,10 @@ __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
cc = 0;
for (retry=0;retry<3;retry++) {
schib->pmcw.ena = 0;
cc = msch(schid, schib);
cc = msch_err(schid, schib);
if (cc)
return (cc==3?-ENODEV:-EBUSY);
if (stsch(schid, schib) || !css_sch_is_valid(schib))
if (stsch_err(schid, schib) || !css_sch_is_valid(schib))
return -ENODEV;
if (!schib->pmcw.ena)
return 0;
@ -913,7 +913,7 @@ static int stsch_reset(struct subchannel_id schid, struct schib *addr)
pgm_check_occured = 0;
s390_base_pgm_handler_fn = cio_reset_pgm_check_handler;
rc = stsch(schid, addr);
rc = stsch_err(schid, addr);
s390_base_pgm_handler_fn = NULL;
/* The program check handler could have changed pgm_check_occured. */
@ -950,7 +950,7 @@ static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
/* No default clear strategy */
break;
}
stsch(schid, &schib);
stsch_err(schid, &schib);
__disable_subchannel_easy(schid, &schib);
}
out:
@ -1086,7 +1086,7 @@ int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
schid = *(struct subchannel_id *)&S390_lowcore.subchannel_id;
if (!schid.one)
return -ENODEV;
if (stsch(schid, &schib))
if (stsch_err(schid, &schib))
return -ENODEV;
if (schib.pmcw.st != SUBCHANNEL_TYPE_IO)
return -ENODEV;

2
drivers/s390/cio/device_fsm.c
View File

@ -45,7 +45,7 @@ static void ccw_timeout_log(struct ccw_device *cdev)
sch = to_subchannel(cdev->dev.parent);
private = to_io_private(sch);
orb = &private->orb;
cc = stsch(sch->schid, &schib);
cc = stsch_err(sch->schid, &schib);
printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
"device information:\n", get_clock());