[PATCH v2] staging: most: video: replace BUG_ON() with pr_warn() in comp_exit()

[Gabriel Rondon <grondon@gmail.com>]

Replace BUG_ON(!list_empty(&video_devices)) with an explicit check
and pr_warn() in the module exit function.

BUG_ON() is deprecated as it crashes the entire kernel on assertion
failure (see Documentation/process/deprecated.rst). WARN_ON() is
also inappropriate here since it crashes the system when
panic-on-warn is enabled. Use pr_warn() to log the unexpected
condition without any risk of crashing.

This is the last remaining BUG_ON() in the staging/most subsystem,
following the dim2 series that replaced five BUG_ON() calls.

Signed-off-by: Gabriel Rondon <grondon@gmail.com>
---
Changes since v1:
- Use pr_warn() instead of WARN_ON() to avoid crash with panic-on-warn
  (Greg Kroah-Hartman)

 drivers/staging/most/video/video.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/most/video/video.c b/drivers/staging/most/video/video.c
index 04351f8ccccf..c5425c207552 100644
--- a/drivers/staging/most/video/video.c
+++ b/drivers/staging/most/video/video.c
@@ -577,7 +577,8 @@ static void __exit comp_exit(void)
 
 	most_deregister_configfs_subsys(&comp);
 	most_deregister_component(&comp);
-	BUG_ON(!list_empty(&video_devices));
+	if (!list_empty(&video_devices))
+		pr_warn("video_devices list not empty on exit\n");
 }
 
 module_init(comp_init);
-- 
2.33.0