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@xxxxxxxxxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Reviewed-by: Baptiste Reynal <b.reynal@xxxxxxxxxxxxxxxxxxxxxx>
---
drivers/vfio/platform/vfio_platform_common.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index 8509189..900fd7f 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -243,7 +243,15 @@ 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);
}
--
1.8.2.1
--
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