[S390] cio: notify drivers of channel path events
This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.
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.c b/drivers/s390/cio/device.c
index 07b1a07..881bdfd 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1147,6 +1147,7 @@
static int io_subchannel_chp_event(struct subchannel *sch,
struct chp_link *link, int event)
{
+ struct ccw_device *cdev = sch_get_cdev(sch);
int mask;
mask = chp_ssd_get_mask(&sch->ssd_info, link);
@@ -1156,22 +1157,30 @@
case CHP_VARY_OFF:
sch->opm &= ~mask;
sch->lpm &= ~mask;
+ if (cdev)
+ cdev->private->path_gone_mask |= mask;
io_subchannel_terminate_path(sch, mask);
break;
case CHP_VARY_ON:
sch->opm |= mask;
sch->lpm |= mask;
+ if (cdev)
+ cdev->private->path_new_mask |= mask;
io_subchannel_verify(sch);
break;
case CHP_OFFLINE:
if (cio_update_schib(sch))
return -ENODEV;
+ if (cdev)
+ cdev->private->path_gone_mask |= mask;
io_subchannel_terminate_path(sch, mask);
break;
case CHP_ONLINE:
if (cio_update_schib(sch))
return -ENODEV;
sch->lpm |= mask & sch->opm;
+ if (cdev)
+ cdev->private->path_new_mask |= mask;
io_subchannel_verify(sch);
break;
}