s390/cio: skip broken paths

Omit known to be broken paths (those set in path_noirq_mask) for the
sense/set PGID and nop IO commands.

Note: path_noirq_mask will be reset in ccw_device_verify_start (the
paths could be healthy again). However if we restart a path
verification via verify_start this mask will not be reset (there is
no need to let the wait for an interrupt time out again - plus we
do not want to loop once we deal with the paths in unknown path group
state).

Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index 6f2987d..f12beb7 100644 (file)
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -70,8 +70,8 @@ static void nop_do(struct ccw_device *cdev)
        struct subchannel *sch = to_subchannel(cdev->dev.parent);
        struct ccw_request *req = &cdev->private->req;
 
-       /* Adjust lpm. */
-       req->lpm = lpm_adjust(req->lpm, sch->schib.pmcw.pam & sch->opm);
+       req->lpm = lpm_adjust(req->lpm, sch->schib.pmcw.pam & sch->opm &
+                             ~cdev->private->path_noirq_mask);
        if (!req->lpm)
                goto out_nopath;
        nop_build_cp(cdev);
@@ -345,8 +345,9 @@ static void snid_done(struct ccw_device *cdev, int rc)
        else {
                donepm = pgid_to_donepm(cdev);
                sch->vpm = donepm & sch->opm;
-               cdev->private->pgid_todo_mask &= ~donepm;
                cdev->private->pgid_reset_mask |= reset;
+               cdev->private->pgid_todo_mask &=
+                       ~(donepm | cdev->private->path_noirq_mask);
                pgid_fill(cdev, pgid);
        }
 out:
@@ -400,8 +401,8 @@ static void snid_do(struct ccw_device *cdev)
        struct subchannel *sch = to_subchannel(cdev->dev.parent);
        struct ccw_request *req = &cdev->private->req;
 
-       /* Adjust lpm if paths are not set in pam. */
-       req->lpm = lpm_adjust(req->lpm, sch->schib.pmcw.pam);
+       req->lpm = lpm_adjust(req->lpm, sch->schib.pmcw.pam &
+                             ~cdev->private->path_noirq_mask);
        if (!req->lpm)
                goto out_nopath;
        snid_build_cp(cdev);