linux-kernel - [PATCH] media/video/planb: fix obvious interrupt handling bugs

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Message-Id: <da61b43a149fee24af8b8db3e6e7efe2629ad79e.1193390975.git.jeff@garzik.org>
Date:	Fri, 26 Oct 2007 05:40:27 -0400 (EDT)
From:	Jeff Garzik <jeff@...zik.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	akpm@...ux-foundation.org, mchehab@...radead.org
Subject: [PATCH] media/video/planb: fix obvious interrupt handling bugs

irq handlers have returned a return value for years now... catch up with
the times.

Also, ditch unneeded prototype.

Signed-off-by: Jeff Garzik <jgarzik@...hat.com>
---
 drivers/media/video/planb.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/video/planb.c b/drivers/media/video/planb.c
index ce4b2f9..36047d4 100644
--- a/drivers/media/video/planb.c
+++ b/drivers/media/video/planb.c
@@ -91,7 +91,6 @@ static void planb_close(struct video_device *);
 static int planb_ioctl(struct video_device *, unsigned int, void *);
 static int planb_init_done(struct video_device *);
 static int planb_mmap(struct video_device *, const char *, unsigned long);
-static void planb_irq(int, void *);
 static void release_planb(void);
 int init_planbs(struct video_init *);
 
@@ -1315,7 +1314,7 @@ cmd_tab_data_end:
 	return c1;
 }
 
-static void planb_irq(int irq, void *dev_id)
+static irqreturn_t planb_irq(int irq, void *dev_id)
 {
 	unsigned int stat, astat;
 	struct planb *pb = (struct planb *)dev_id;
@@ -1358,13 +1357,14 @@ static void planb_irq(int irq, void *dev_id)
 		pb->frame_stat[fr] = GBUFFER_DONE;
 		pb->grabbing--;
 		wake_up_interruptible(&pb->capq);
-		return;
+		return IRQ_HANDLED;
 	}
 	/* incorrect interrupts? */
 	pb->intr_mask = PLANB_CLR_IRQ;
 	out_le32(&pb->planb_base->intr_stat, PLANB_CLR_IRQ);
 	printk(KERN_ERR "PlanB: IRQ lockup, cleared intrrupts"
 							" unconditionally\n");
+	return IRQ_HANDLED;
 }
 
 /*******************************
@@ -2090,7 +2090,7 @@ static int init_planb(struct planb *pb)
 	/* clear interrupt mask */
 	pb->intr_mask = PLANB_CLR_IRQ;
 
-	result = request_irq(pb->irq, planb_irq, 0, "PlanB", (void *)pb);
+	result = request_irq(pb->irq, planb_irq, 0, "PlanB", pb);
 	if (result < 0) {
 		if (result==-EINVAL)
 			printk(KERN_ERR "PlanB: Bad irq number (%d) "
-- 
1.5.2.4

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