linux-kernel - [PATCH] misc: apds9802als: Fix checking timeout in als_wait_for_data

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Message-ID: <1352446287.27977.2.camel@phoenix>
Date:	Fri, 09 Nov 2012 15:31:27 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	Anantha Narayanan <anantha.narayanan@...el.com>,
	Alan Cox <alan@...ux.intel.com>, Arnd Bergmann <arnd@...db.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] misc: apds9802als: Fix checking timeout in
 als_wait_for_data_ready()

In the case of timeout waiting for data ready, the retry variable is -1.
This also fixes a bug: current code returns -ETIMEDOUT if latest retry success
( which means retry is 0 when exiting the while loop ).

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/misc/apds9802als.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c
index 0314773..94923d2 100644
--- a/drivers/misc/apds9802als.c
+++ b/drivers/misc/apds9802als.c
@@ -68,7 +68,7 @@ static int als_wait_for_data_ready(struct device *dev)
 		ret = i2c_smbus_read_byte_data(client, 0x86);
 	} while (!(ret & 0x80) && retry--);
 
-	if (!retry) {
+	if (retry < 0) {
 		dev_warn(dev, "timeout waiting for data ready\n");
 		return -ETIMEDOUT;
 	}
-- 
1.7.9.5



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