V4L/DVB (13866): gspca - main: Add the cam flag 'no_urb_create'.

This flag permits subdrivers to create specific transfer URBs.

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

2 files changed, 14 insertions, 10 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 0e6a4ec0fec9..61be007e8fb3 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -607,11 +607,14 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
                 goto out;
         }
         for (;;) {
-                PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
-                ret = create_urbs(gspca_dev, ep);
-                if (ret < 0) {
-                        destroy_urbs(gspca_dev);
-                        goto out;
+                if (!gspca_dev->cam.no_urb_create) {
+                        PDEBUG(D_STREAM, "init transfer alt %d",
+                                gspca_dev->alt);
+                        ret = create_urbs(gspca_dev, ep);
+                        if (ret < 0) {
+                                destroy_urbs(gspca_dev);
+                                goto out;
+                        }
                 }
 
                 /* clear the bulk endpoint */
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index f0b4cbc33bf3..790dad736888 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -54,20 +54,21 @@ struct framerates {
 
 /* device information - set at probe time */
 struct cam {
-        int bulk_size;          /* buffer size when image transfer by bulk */
         const struct v4l2_pix_format *cam_mode; /* size nmodes */
-        char nmodes;
         const struct framerates *mode_framerates; /* must have size nmode,
                                                    * just like cam_mode */
-        __u8 bulk_nurbs;        /* number of URBs in bulk mode
+        u32 bulk_size;          /* buffer size when image transfer by bulk */
+        u32 input_flags;        /* value for ENUM_INPUT status flags */
+        u8 nmodes;              /* size of cam_mode */
+        u8 no_urb_create;       /* don't create transfer URBs */
+        u8 bulk_nurbs;          /* number of URBs in bulk mode
                                  * - cannot be > MAX_NURBS
                                  * - when 0 and bulk_size != 0 means
                                  *   1 URB and submit done by subdriver */
         u8 bulk;                /* image transfer by 0:isoc / 1:bulk */
         u8 npkt;                /* number of packets in an ISOC message
                                  * 0 is the default value: 32 packets */
-        u32 input_flags;        /* value for ENUM_INPUT status flags */
-        char reverse_alts;      /* Alt settings are in high to low order */
+        u8 reverse_alts;        /* Alt settings are in high to low order */
 };
 
 struct gspca_dev;