linux-kernel - [PATCH 6/7] mx3fb: Fix the usage of wait_for_completion

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Message-ID: <1352223194.15558.1601.camel@cliu38-desktop-build>
Date:	Wed, 07 Nov 2012 01:33:14 +0800
From:	Chuansheng Liu <chuansheng.liu@...el.com>
To:	FlorianSchandinat@....de
Cc:	linux-kernel@...r.kernel.org, chuansheng.liu@...el.com
Subject: [PATCH 6/7] mx3fb: Fix the usage of wait_for_completion_timeout


The return value of wait_for_completion_timeout() is always
>= 0 with unsigned int type.

So the condition "ret < 0" or "ret >= 0" is pointless.

Signed-off-by: liu chuansheng <chuansheng.liu@...el.com>
---
 drivers/video/mx3fb.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index ce1d452..88bf368 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -1110,12 +1110,11 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var,
 	enable_irq(mx3_fbi->idmac_channel->eof_irq);
 
 	ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
-	if (ret <= 0) {
+	if (ret == 0) {
 		mutex_unlock(&mx3_fbi->mutex);
-		dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
-			 "user interrupt" : "timeout");
+		dev_info(fbi->device, "Panning failed due to timeout\n");
 		disable_irq(mx3_fbi->idmac_channel->eof_irq);
-		return ret ? : -ETIMEDOUT;
+		return -ETIMEDOUT;
 	}
 
 	mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
-- 
1.7.0.4



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