linux-kernel - [PATCH 1/1] nouveau: ratelimit IRQ messages

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Date:	Sat,  2 Oct 2010 09:58:56 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	airlied@...hat.com
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Ben Skeggs <bskeggs@...hat.com>
Subject: [PATCH 1/1] nouveau: ratelimit IRQ messages

There are two messages in the ISR of nouvea which might be printed out
hundred times in a second. Ratelimit them.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Ben Skeggs <bskeggs@...hat.com>
---
 drivers/gpu/drm/nouveau/nouveau_irq.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
index 794b0ee..c6d57eb 100644
--- a/drivers/gpu/drm/nouveau/nouveau_irq.c
+++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
@@ -200,7 +200,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
 		}
 
 		if (status & NV_PFIFO_INTR_DMA_PUSHER) {
-			NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n", chid);
+			if (printk_ratelimit())
+				NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n",
+						chid);
 
 			status &= ~NV_PFIFO_INTR_DMA_PUSHER;
 			nv_wr32(dev, NV03_PFIFO_INTR_0,
@@ -227,8 +229,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
 		}
 
 		if (status) {
-			NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
-				status, chid);
+			if (printk_ratelimit())
+				NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
+					status, chid);
 			nv_wr32(dev, NV03_PFIFO_INTR_0, status);
 			status = 0;
 		}
-- 
1.7.3.1


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