diff options
| author | Dan Carpenter <error27@gmail.com> | 2009-02-03 16:35:17 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2009-02-17 13:25:01 +0100 |
| commit | dfd395aff4cb16d2480b280064bea1b19ededef1 (patch) | |
| tree | 54a64c67f6284fe431126741033fcf71bfbe809c /drivers | |
| parent | 35cfd1d964f3c2420862f2167a0eb85ff1208999 (diff) | |
| download | lwn-dfd395aff4cb16d2480b280064bea1b19ededef1.tar.gz lwn-dfd395aff4cb16d2480b280064bea1b19ededef1.zip | |
HID: unlock properly on error paths in hidraw_ioctl()
We can't return immediately because lock_kernel() is held.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hid/hidraw.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index 732449628971..02b19db5442e 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -267,8 +267,10 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, default: { struct hid_device *hid = dev->hid; - if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ) - return -EINVAL; + if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ) { + ret = -EINVAL; + break; + } if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWNAME(0))) { int len; @@ -277,8 +279,9 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, len = strlen(hid->name) + 1; if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); - return copy_to_user(user_arg, hid->name, len) ? + ret = copy_to_user(user_arg, hid->name, len) ? -EFAULT : len; + break; } if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWPHYS(0))) { @@ -288,12 +291,13 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, len = strlen(hid->phys) + 1; if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd); - return copy_to_user(user_arg, hid->phys, len) ? + ret = copy_to_user(user_arg, hid->phys, len) ? -EFAULT : len; + break; } } - ret = -ENOTTY; + ret = -ENOTTY; } unlock_kernel(); return ret; |