[S390] cio: Issue SenseID per path.
We may receive a unit check for every path when we issue a SenseID. Unfortunately, the channel subsystem will try on a different path every time if we use a lpm of 0xff, which will exhaust our retry counter. Therefore, revert SenseID to its previous per-path behaviour and just leave out the suspend multipath reconnect. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -113,6 +113,7 @@ __ccw_device_sense_id_start(struct ccw_device *cdev)
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{
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struct subchannel *sch;
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struct ccw1 *ccw;
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int ret;
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sch = to_subchannel(cdev->dev.parent);
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/* Setup sense channel program. */
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@ -124,9 +125,25 @@ __ccw_device_sense_id_start(struct ccw_device *cdev)
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/* Reset device status. */
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memset(&cdev->private->irb, 0, sizeof(struct irb));
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cdev->private->flags.intretry = 0;
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return cio_start(sch, ccw, LPM_ANYPATH);
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/* Try on every path. */
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ret = -ENODEV;
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while (cdev->private->imask != 0) {
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if ((sch->opm & cdev->private->imask) != 0 &&
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cdev->private->iretry > 0) {
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cdev->private->iretry--;
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/* Reset internal retry indication. */
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cdev->private->flags.intretry = 0;
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ret = cio_start (sch, cdev->private->iccws,
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cdev->private->imask);
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/* ret is 0, -EBUSY, -EACCES or -ENODEV */
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if (ret != -EACCES)
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return ret;
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}
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cdev->private->imask >>= 1;
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cdev->private->iretry = 5;
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}
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return ret;
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}
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void
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@ -136,7 +153,8 @@ ccw_device_sense_id_start(struct ccw_device *cdev)
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memset (&cdev->private->senseid, 0, sizeof (struct senseid));
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cdev->private->senseid.cu_type = 0xFFFF;
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cdev->private->iretry = 3;
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cdev->private->imask = 0x80;
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cdev->private->iretry = 5;
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ret = __ccw_device_sense_id_start(cdev);
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if (ret && ret != -EBUSY)
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ccw_device_sense_id_done(cdev, ret);
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@ -252,13 +270,14 @@ ccw_device_sense_id_irq(struct ccw_device *cdev, enum dev_event dev_event)
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ccw_device_sense_id_done(cdev, ret);
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break;
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case -EACCES: /* channel is not operational. */
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sch->lpm &= ~cdev->private->imask;
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cdev->private->imask >>= 1;
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cdev->private->iretry = 5;
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/* fall through. */
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case -EAGAIN: /* try again. */
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cdev->private->iretry--;
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if (cdev->private->iretry > 0) {
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ret = __ccw_device_sense_id_start(cdev);
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if (ret == 0 || ret == -EBUSY)
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break;
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}
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ret = __ccw_device_sense_id_start(cdev);
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if (ret == 0 || ret == -EBUSY)
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break;
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/* fall through. */
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default: /* Sense ID failed. Try asking VM. */
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if (MACHINE_IS_VM) {
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