linux-kernel - [PATCH] video: pxa3xx-gcu: Return -EFAULT when copy_from

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Message-Id: <1294997951.12295.1.camel@mola>
Date:	Fri, 14 Jan 2011 17:39:11 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Daniel Mack <daniel@...aq.de>, Janine Kropp <nin@...ectfb.org>,
	Denis Oliver Kropp <dok@...ectfb.org>,
	Eric Miao <eric.y.miao@...il.com>, linux-fbdev@...r.kernel.org
Subject: [PATCH] video: pxa3xx-gcu: Return -EFAULT when copy_from_user()
	fails

Return -EFAULT instead of number of bytes that could not be copied if
copy_from_user() fails.

Also fix a typo in the comments.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/video/pxa3xx-gcu.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/pxa3xx-gcu.c b/drivers/video/pxa3xx-gcu.c
index b81168d..cf4beb9 100644
--- a/drivers/video/pxa3xx-gcu.c
+++ b/drivers/video/pxa3xx-gcu.c
@@ -1,5 +1,5 @@
 /*
- *  pxa3xx-gc.c - Linux kernel module for PXA3xx graphics controllers
+ *  pxa3xx-gcu.c - Linux kernel module for PXA3xx graphics controllers
  *
  *  This driver needs a DirectFB counterpart in user space, communication
  *  is handled via mmap()ed memory areas and an ioctl.
@@ -421,7 +421,7 @@ pxa3xx_gcu_misc_write(struct file *filp, const char *buff,
 		buffer->next = priv->free;
 		priv->free = buffer;
 		spin_unlock_irqrestore(&priv->spinlock, flags);
-		return ret;
+		return -EFAULT;
 	}
 
 	buffer->length = words;
-- 
1.7.2



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