linux-kernel - [PATCH] video: pxa3xx-gcu: Simplify the logic to exit while loop in pxa3xx_gcu_wait

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Date:	Tue, 27 Mar 2012 11:15:56 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Daniel Mack <daniel@...aq.de>,
	Sven Neumann <s.neumann@...mfeld.com>,
	Janine Kropp <nin@...ectfb.org>,
	Denis Oliver Kropp <dok@...ectfb.org>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	linux-fbdev@...r.kernel.org
Subject: [PATCH] video: pxa3xx-gcu: Simplify the logic to exit while loop in
 pxa3xx_gcu_wait_idle

If wait_event_interruptible_timeout returns a positive value, it means
the condition evaluated is true. Which means priv->shared->hw_running is false.
And then we will exit the loop.

This patch simplifies the logic to exit the while loop.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/video/pxa3xx-gcu.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/drivers/video/pxa3xx-gcu.c b/drivers/video/pxa3xx-gcu.c
index 1d71c08..0b4ae0c 100644
--- a/drivers/video/pxa3xx-gcu.c
+++ b/drivers/video/pxa3xx-gcu.c
@@ -316,12 +316,9 @@ pxa3xx_gcu_wait_idle(struct pxa3xx_gcu_priv *priv)
 		ret = wait_event_interruptible_timeout(priv->wait_idle,
 					!priv->shared->hw_running, HZ*4);
 
-		if (ret < 0)
+		if (ret != 0)
 			break;
 
-		if (ret > 0)
-			continue;
-
 		if (gc_readl(priv, REG_GCRBEXHR) == rbexhr &&
 		    priv->shared->num_interrupts == num) {
 			QERROR("TIMEOUT");
-- 
1.7.5.4



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