diff options
| author | Axel Lin <axel.lin@gmail.com> | 2011-03-22 16:34:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:10 -0700 |
| commit | 6f7d485e13c6c07348cf9cfd1b735fe1bcf3caa9 (patch) | |
| tree | e29567aa27363fc8072a355d89d951ef95c41920 /drivers/misc/hmc6352.c | |
| parent | 4e6735992392ecd393674119aef9ec7bff9be5b0 (diff) | |
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 <axel.lin@gmail.com>
Cc: Kalhan Trisal <kalhan.trisal@intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/hmc6352.c')
| -rw-r--r-- | drivers/misc/hmc6352.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/hmc6352.c b/drivers/misc/hmc6352.c index 234bfcaf209..ca938fc8a8d 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; } |