V4L/DVB (8829): gspca: Have a clean kmalloc-ated buffer for USB exchanges.

The USB buffer may be used for DMA and there may be a caching problem
if the buffer is part of the device structure.
Thanks to Alan Stern.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/media/video/gspca/conex.c b/drivers/media/video/gspca/conex.c
index 3db5c1e3283a..8c91ffde9536 100644
--- a/drivers/media/video/gspca/conex.c
+++ b/drivers/media/video/gspca/conex.c
@@ -124,7 +124,7 @@ static void reg_r(struct gspca_dev *gspca_dev,
         struct usb_device *dev = gspca_dev->dev;
 
 #ifdef GSPCA_DEBUG
-        if (len > sizeof gspca_dev->usb_buf) {
+        if (len > USB_BUF_SZ) {
                 err("reg_r: buffer overflow");
                 return;
         }
@@ -164,7 +164,7 @@ static void reg_w(struct gspca_dev *gspca_dev,
         struct usb_device *dev = gspca_dev->dev;
 
 #ifdef GSPCA_DEBUG
-        if (len > sizeof gspca_dev->usb_buf) {
+        if (len > USB_BUF_SZ) {
                 err("reg_w: buffer overflow");
                 return;
         }