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vfio: platform: check reset call return code during release

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Release call is ignoring the return code from reset call and can
potentially continue even though reset call failed.

If reset_required module parameter is set, this patch is going
to validate the return code and will cause stack dump with
WARN_ON and warn the user of failure.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Sinan Kaya 2016-07-19 09:01:49 -04:00 committed by Alex Williamson
parent e99442323f
commit 0991bbdbf5
1 changed files with 9 additions and 1 deletions
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10
drivers/vfio/platform/vfio_platform_common.c
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@ -230,7 +230,15 @@ static void vfio_platform_release(void *device_data)
mutex_lock(&driver_lock);
if (!(--vdev->refcnt)) {
vfio_platform_call_reset(vdev, NULL);
const char *extra_dbg = NULL;
int ret;
ret = vfio_platform_call_reset(vdev, &extra_dbg);
if (ret && vdev->reset_required) {
dev_warn(vdev->device, "reset driver is required and reset call failed in release (%d) %s\n",
ret, extra_dbg ? extra_dbg : "");
WARN_ON(1);
}
vfio_platform_regions_cleanup(vdev);
vfio_platform_irq_cleanup(vdev);
}