From: Sebastian Ott Date: Mon, 28 Jan 2013 18:31:50 +0000 (+0100) Subject: s390/cio: skip broken paths X-Git-Tag: firefly_0821_release~3680^2~1064^2~30 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e6a0b7c90f9f2663f470bbfaf83afcf52f8459e8;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index 6f2987d8da99..f12beb72f263 100644 --- 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);