2023-11-25 09:10:33

by Ghanshyam Agrawal

[permalink] [raw]
Subject: [PATCH V4] media: stk1160: Fixed high volume of stk1160_dbg messages

The function stk1160_dbg gets called too many times, which causes
the output to get flooded with messages. Since stk1160_dbg uses
printk, it is now replaced with printk_ratelimited.

Suggested-by: Phillip Potter <[email protected]>
Signed-off-by: Ghanshyam Agrawal <[email protected]>
---
V4:
Updated printk_ratelimited to KERN_DEBUG level instead of
KERN_WARNING level since the original function in use,
stk1160_dbg, uses KERN_DEBUG level.

V3:
Fixed the issue with my patch needing previous versions being applied
first.

Used printk_ratelimited instead of dev_warn_ratelimited because
of compiler error "incompatible pointer type".

V2:
To add KERN_WARNING in printk_ratelimited, and later as per warning by
the checkpatch script, replaced printk_ratelimited with
dev_warn_ratelimited.

V1:
The function stk1160_dbg gets called too many times, which causes
the output to get flooded with messages. Since stk1160_dbg uses
printk, it is now replaced with dev_warn_ratelimited.

drivers/media/usb/stk1160/stk1160-video.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/media/usb/stk1160/stk1160-video.c b/drivers/media/usb/stk1160/stk1160-video.c
index 4e966f6bf608..366f0e4a5dc0 100644
--- a/drivers/media/usb/stk1160/stk1160-video.c
+++ b/drivers/media/usb/stk1160/stk1160-video.c
@@ -107,8 +107,7 @@ void stk1160_copy_video(struct stk1160 *dev, u8 *src, int len)

/*
* TODO: These stk1160_dbg are very spammy!
- * We should 1) check why we are getting them
- * and 2) add ratelimit.
+ * We should check why we are getting them.
*
* UPDATE: One of the reasons (the only one?) for getting these
* is incorrect standard (mismatch between expected and configured).
@@ -151,7 +150,7 @@ void stk1160_copy_video(struct stk1160 *dev, u8 *src, int len)

/* Let the bug hunt begin! sanity checks! */
if (lencopy < 0) {
- stk1160_dbg("copy skipped: negative lencopy\n");
+ printk_ratelimited(KERN_DEBUG "copy skipped: negative lencopy\n");
return;
}

--
2.25.1