V4L/DVB (8352): gspca: Buffers for USB exchanges cannot be in the stack.

gspca:    Protect dq_callback() against simultaneous USB exchanges.
          Temporary buffer for USB exchanges added in the device struct.
(all)     Use a temporary buffer for all USB exchanges.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 78fccefcd576..3fd2c4eee204 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -125,6 +125,7 @@ struct gspca_dev {
         struct cam cam;                         /* device information */
         const struct sd_desc *sd_desc;          /* subdriver description */
 
+        __u8 usb_buf[8];                        /* buffer for USB exchanges */
         struct urb *urb[MAX_NURBS];
 
         __u8 *frbuf;                            /* buffer for nframes */