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authorDong Jia Shi <bjsdjshi@linux.vnet.ibm.com>2018-05-02 09:25:59 +0200
committerCornelia Huck <cohuck@redhat.com>2018-05-29 09:27:41 +0200
commit2c861d89ccda2fbcea9358eff9cc5f8fae548be5 (patch)
treefd337ef9fab21ce5b064c2e2cff7c585772f7849 /drivers/s390/cio
parent3376d98021e915196f4894d835325a884e635a04 (diff)
vfio: ccw: fix error return in vfio_ccw_sch_event
If the device has not been registered, or there is work pending, we should reschedule a sch_event call again. Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Message-Id: <20180502072559.50691-1-bjsdjshi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/vfio_ccw_drv.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index ea6a2d0b2894..770fa9cfc310 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -177,6 +177,7 @@ static int vfio_ccw_sch_event(struct subchannel *sch, int process)
{
struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
unsigned long flags;
+ int rc = -EAGAIN;
spin_lock_irqsave(sch->lock, flags);
if (!device_is_registered(&sch->dev))
@@ -187,6 +188,7 @@ static int vfio_ccw_sch_event(struct subchannel *sch, int process)
if (cio_update_schib(sch)) {
vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_NOT_OPER);
+ rc = 0;
goto out_unlock;
}
@@ -195,11 +197,12 @@ static int vfio_ccw_sch_event(struct subchannel *sch, int process)
private->state = private->mdev ? VFIO_CCW_STATE_IDLE :
VFIO_CCW_STATE_STANDBY;
}
+ rc = 0;
out_unlock:
spin_unlock_irqrestore(sch->lock, flags);
- return 0;
+ return rc;
}
static struct css_device_id vfio_ccw_sch_ids[] = {