From 6f7d485e13c6c07348cf9cfd1b735fe1bcf3caa9 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Tue, 22 Mar 2011 16:34:00 -0700 Subject: drivers/misc/hmc6352.c: fix wrong return value checking for i2c_master_recv() i2c_master_recv() returns negative errno, or else the number of bytes read. Thus i2c_master_recv(client, i2c_data, 2) returns 2 instead of 1 in success case. [akpm@linux-foundation.org: make `ret' signed] Signed-off-by: Axel Lin Cc: Kalhan Trisal Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/misc/hmc6352.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/misc/hmc6352.c b/drivers/misc/hmc6352.c index 234bfca..ca938fc 100644 --- a/drivers/misc/hmc6352.c +++ b/drivers/misc/hmc6352.c @@ -75,7 +75,7 @@ static ssize_t compass_heading_data_show(struct device *dev, { struct i2c_client *client = to_i2c_client(dev); unsigned char i2c_data[2]; - unsigned int ret; + int ret; mutex_lock(&compass_mutex); ret = compass_command(client, 'A'); @@ -86,7 +86,7 @@ static ssize_t compass_heading_data_show(struct device *dev, msleep(10); /* sending 'A' cmd we need to wait for 7-10 millisecs */ ret = i2c_master_recv(client, i2c_data, 2); mutex_unlock(&compass_mutex); - if (ret != 1) { + if (ret < 0) { dev_warn(dev, "i2c read data cmd failed\n"); return ret; } -- cgit v1.1