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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-10-25 16:10:34 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:19 +0200
commit585b954e1f2fa325d425b0786e4525ac7c9ae575 (patch)
treee79174793782e81820c7f6896284f7e341bf9e9d /drivers/s390/cio/device.c
parent[S390] css: update subchannel description after hibernate (diff)
downloadlinux-585b954e1f2fa325d425b0786e4525ac7c9ae575.tar.xz
linux-585b954e1f2fa325d425b0786e4525ac7c9ae575.zip
[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>
Diffstat (limited to 'drivers/s390/cio/device.c')
-rw-r--r--drivers/s390/cio/device.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 07b1a074beaf..881bdfd99140 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1147,6 +1147,7 @@ err:
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 @@ static int io_subchannel_chp_event(struct subchannel *sch,
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;
}