linux-kernel - [PATCH] media: stk1160: Fixed high volume of stk1160

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Date:   Sun, 29 Oct 2023 20:06:04 +0530
From:   Ghanshyam Agrawal <ghanshyam1898@...il.com>
To:     ezequiel@...guardiasur.com.ar, mchehab@...nel.org
Cc:     Ghanshyam Agrawal <ghanshyam1898@...il.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        skhan@...uxfoundation.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH] 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 directly.

Signed-off-by: Ghanshyam Agrawal <ghanshyam1898@...il.com>
---
 drivers/media/usb/stk1160/stk1160-video.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/media/usb/stk1160/stk1160-video.c b/drivers/media/usb/stk1160/stk1160-video.c
index 4e966f6bf608..f5b75f380c19 100644
--- a/drivers/media/usb/stk1160/stk1160-video.c
+++ b/drivers/media/usb/stk1160/stk1160-video.c
@@ -105,17 +105,6 @@ void stk1160_copy_video(struct stk1160 *dev, u8 *src, int len)
 	u8 *dst = buf->mem;
 	int remain;
 
-	/*
-	 * TODO: These stk1160_dbg are very spammy!
-	 * We should 1) check why we are getting them
-	 * and 2) add ratelimit.
-	 *
-	 * UPDATE: One of the reasons (the only one?) for getting these
-	 * is incorrect standard (mismatch between expected and configured).
-	 * So perhaps, we could add a counter for errors. When the counter
-	 * reaches some value, we simply stop streaming.
-	 */
-
 	len -= 4;
 	src += 4;
 
@@ -151,7 +140,7 @@ 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("copy skipped: negative lencopy\n");
 		return;
 	}
 
-- 
2.25.1