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[S390] cio: change device sense procedure to work with pav aliases

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Modify the sense id channel program to allow device sensing of pav
alias devices which belong to a base device with ungrouped paths.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2007-11-20 11:13:30 +01:00 committed by Martin Schwidefsky
parent 2ffbb8377c
commit 3b8c88993e
1 changed files with 9 additions and 36 deletions
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45
drivers/s390/cio/device_id.c
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@ -113,19 +113,10 @@ __ccw_device_sense_id_start(struct ccw_device *cdev)
{
struct subchannel *sch;
struct ccw1 *ccw;
int ret;
sch = to_subchannel(cdev->dev.parent);
/* Setup sense channel program. */
ccw = cdev->private->iccws;
if (sch->schib.pmcw.pim != 0x80) {
/* more than one path installed. */
ccw->cmd_code = CCW_CMD_SUSPEND_RECONN;
ccw->cda = 0;
ccw->count = 0;
ccw->flags = CCW_FLAG_SLI | CCW_FLAG_CC;
ccw++;
}
ccw->cmd_code = CCW_CMD_SENSE_ID;
ccw->cda = (__u32) __pa (&cdev->private->senseid);
ccw->count = sizeof (struct senseid);
@ -133,25 +124,9 @@ __ccw_device_sense_id_start(struct ccw_device *cdev)
/* Reset device status. */
memset(&cdev->private->irb, 0, sizeof(struct irb));
cdev->private->flags.intretry = 0;
/* Try on every path. */
ret = -ENODEV;
while (cdev->private->imask != 0) {
if ((sch->opm & cdev->private->imask) != 0 &&
cdev->private->iretry > 0) {
cdev->private->iretry--;
/* Reset internal retry indication. */
cdev->private->flags.intretry = 0;
ret = cio_start (sch, cdev->private->iccws,
cdev->private->imask);
/* ret is 0, -EBUSY, -EACCES or -ENODEV */
if (ret != -EACCES)
return ret;
}
cdev->private->imask >>= 1;
cdev->private->iretry = 5;
}
return ret;
return cio_start(sch, ccw, LPM_ANYPATH);
}
void
@ -161,8 +136,7 @@ ccw_device_sense_id_start(struct ccw_device *cdev)
memset (&cdev->private->senseid, 0, sizeof (struct senseid));
cdev->private->senseid.cu_type = 0xFFFF;
cdev->private->imask = 0x80;
cdev->private->iretry = 5;
cdev->private->iretry = 3;
ret = __ccw_device_sense_id_start(cdev);
if (ret && ret != -EBUSY)
ccw_device_sense_id_done(cdev, ret);
@ -278,14 +252,13 @@ ccw_device_sense_id_irq(struct ccw_device *cdev, enum dev_event dev_event)
ccw_device_sense_id_done(cdev, ret);
break;
case -EACCES: /* channel is not operational. */
sch->lpm &= ~cdev->private->imask;
cdev->private->imask >>= 1;
cdev->private->iretry = 5;
/* fall through. */
case -EAGAIN: /* try again. */
ret = __ccw_device_sense_id_start(cdev);
if (ret == 0 || ret == -EBUSY)
break;
cdev->private->iretry--;
if (cdev->private->iretry > 0) {
ret = __ccw_device_sense_id_start(cdev);
if (ret == 0 || ret == -EBUSY)
break;
}
/* fall through. */
default: /* Sense ID failed. Try asking VM. */
if (MACHINE_IS_VM) {