linux-kernel - [RFC PATCH] hda_intel: ratelimit "spurious response" message

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Message-ID: <1383854115.9263.21.camel@joe-AO722>
Date:	Thu, 07 Nov 2013 11:55:15 -0800
From:	Joe Perches <joe@...ches.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	alsa-devel <alsa-devel@...a-project.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH] hda_intel: ratelimit "spurious response" message

dmesg here has a 100+ consecutive lines of:

[ 1464.219446] hda-intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x170500
[ 1464.219451] hda-intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x170500
[ 1464.219454] hda-intel 0000:00:14.2: spurious response 0x0:0x0, last cmd=0x170500
...

Ratelimit the message to reduce the dmesg log noise.

Coalesce the format while at it.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 sound/pci/hda/hda_intel.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 6e61a01..6e444ca 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -906,12 +906,12 @@ static void azx_update_rirb(struct azx *chip)
 			chip->rirb.res[addr] = res;
 			smp_wmb();
 			chip->rirb.cmds[addr]--;
-		} else
-			snd_printk(KERN_ERR SFX "%s: spurious response %#x:%#x, "
-				   "last cmd=%#08x\n",
+		} else if (printk_ratelimit()) {
+			snd_printk(KERN_ERR SFX "%s: spurious response %#x:%#x, last cmd=%#08x\n",
 				   pci_name(chip->pci),
 				   res, res_ex,
 				   chip->last_cmd[addr]);
+		}
 	}
 }
 


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