linux-kernel - [PATCH] Fix debugfs_create_file's error checking method for usb/gadget/

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Date:	Fri, 17 Oct 2008 20:54:58 +0800
From:	Zhaolei <zhaolei@...fujitsu.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	dbrownell@...rs.sourceforge.net, linux-usb@...r.kernel.org
Subject: [PATCH] Fix debugfs_create_file's error checking method for usb/gadget/

Hi,

debugfs_create_file() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.

Signed-off-by: Zhao Lei <zhaolei@...fujitsu.com>
---
 drivers/usb/gadget/s3c2410_udc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 29d13eb..4ba50ef 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1894,7 +1894,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 		udc->regs_info = debugfs_create_file("registers", S_IRUGO,
 				s3c2410_udc_debugfs_root,
 				udc, &s3c2410_udc_debugfs_fops);
-		if (IS_ERR(udc->regs_info)) {
+		if (IS_ERR(udc->regs_info) || !udc->regs_info) {
 			dev_warn(dev, "debugfs file creation failed %ld\n",
 				 PTR_ERR(udc->regs_info));
 			udc->regs_info = NULL;
-- 
1.5.5.3


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