From 0991bbdbf5b85bd14a26e783f087b0f2913c93b1 Mon Sep 17 00:00:00 2001 From: Sinan Kaya Date: Tue, 19 Jul 2016 09:01:49 -0400 Subject: [PATCH] vfio: platform: check reset call return code during release 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 Reviewed-by: Eric Auger Reviewed-by: Baptiste Reynal Signed-off-by: Alex Williamson --- 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 389d651..1cf2d46 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -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); } -- 2.7.4