V4L/DVB (6564): Move check before lock

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
CC: Antti Palosaari <crope@iki.fi>
CC: Carl Lundqvist <comabug@gmail.com>
CC: Aapo Tahkola <aet@rasterburn.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 6 insertions, 6 deletions

diff --git a/drivers/media/dvb/dvb-usb/au6610.c b/drivers/media/dvb/dvb-usb/au6610.c
index 18e0b16fb2a9..f3ff81314696 100644
--- a/drivers/media/dvb/dvb-usb/au6610.c
+++ b/drivers/media/dvb/dvb-usb/au6610.c
@@ -79,12 +79,12 @@ static int au6610_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
         struct dvb_usb_device *d = i2c_get_adapdata(adap);
         int i;
 
-        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
-                return -EAGAIN;
-
         if (num > 2)
                 return -EINVAL;
 
+        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+                return -EAGAIN;
+
         for (i = 0; i < num; i++) {
                 /* write/read request */
                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
diff --git a/drivers/media/dvb/dvb-usb/gl861.c b/drivers/media/dvb/dvb-usb/gl861.c
index f01d99c1c43c..6b99d9f4d5b3 100644
--- a/drivers/media/dvb/dvb-usb/gl861.c
+++ b/drivers/media/dvb/dvb-usb/gl861.c
@@ -56,12 +56,12 @@ static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
         struct dvb_usb_device *d = i2c_get_adapdata(adap);
         int i;
 
-        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
-                return -EAGAIN;
-
         if (num > 2)
                 return -EINVAL;
 
+        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+                return -EAGAIN;
+
         for (i = 0; i < num; i++) {
                 /* write/read request */
                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {