From: Irina Tirdea <irina.tirdea@intel.com>
Date: Mon, 13 Apr 2015 15:40:59 +0000 (+0300)
Subject: iio: accel: mma9553: fix gpio bitnum init value
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ef8307a21ac79823b8a4f977eac42329328af384;p=linux-beck.git

iio: accel: mma9553: fix gpio bitnum init value

Initial value of gpio bitnum is set to -1, but
the variable is declared as unsigned.

Use a positive invalid value for initial gpio
bitnum.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Suggested-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---

diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
index 032537fc2c56..9d649c4a21fd 100644
--- a/drivers/iio/accel/mma9553.c
+++ b/drivers/iio/accel/mma9553.c
@@ -77,6 +77,7 @@
 
 /* Bitnum used for GPIO configuration = bit number in high status byte */
 #define MMA9553_STATUS_TO_BITNUM(bit)	(ffs(bit) - 9)
+#define MMA9553_MAX_BITNUM		MMA9553_STATUS_TO_BITNUM(BIT(16))
 
 #define MMA9553_DEFAULT_SAMPLE_RATE	30	/* Hz */
 
@@ -406,8 +407,8 @@ static int mma9553_init(struct mma9553_data *data)
 	}
 
 
-	data->gpio_bitnum = -1;
 	/* Reset GPIO */
+	data->gpio_bitnum = MMA9553_MAX_BITNUM;
 	ret = mma9553_conf_gpio(data);
 	if (ret < 0)
 		return ret;