Re: [PATCH v2 2/7] s390/cio: Set vfio-ccw FSM state before ioeventfd

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 05/14/2019 07:42 PM, Eric Farman wrote:
Otherwise, the guest can believe it's okay to start another I/O
and bump into the non-idle state.  This results in a cc=2 (with
the asynchronous CSCH/HSCH code) returned to the guest, which is
unfortunate since everything is otherwise working normally.

Signed-off-by: Eric Farman <farman@xxxxxxxxxxxxx>
Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
  drivers/s390/cio/vfio_ccw_drv.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 0b3b9de45c60..ddd21b6149fd 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -86,11 +86,11 @@ static void vfio_ccw_sch_io_todo(struct work_struct *work)
  	}
  	memcpy(private->io_region->irb_area, irb, sizeof(*irb));
- if (private->io_trigger)
-		eventfd_signal(private->io_trigger, 1);
-
  	if (private->mdev && is_final)
  		private->state = VFIO_CCW_STATE_IDLE;
+
+	if (private->io_trigger)
+		eventfd_signal(private->io_trigger, 1);
  }
/*

Reviewed-by: Farhan Ali <alifm@xxxxxxxxxxxxx>




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Kernel Development]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Info]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Linux Media]     [Device Mapper]

  Powered by Linux