[media] gspca: Use the global error status for get/set streamparm

Also, in ov534, don't check the parm type.
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/gspca.c

@@ -1708,12 +1708,13 @@ static int vidioc_g_parm(struct file *filp, void *priv,
 
 		if (mutex_lock_interruptible(&gspca_dev->usb_lock))
 			return -ERESTARTSYS;
-		gspca_dev->usb_err = 0;
-		if (gspca_dev->present)
-			ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
-								 parm);
-		else
+		if (gspca_dev->present) {
+			gspca_dev->usb_err = 0;
+			gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
+			ret = gspca_dev->usb_err;
+		} else {
 			ret = -ENODEV;
+		}
 		mutex_unlock(&gspca_dev->usb_lock);
 		return ret;
 	}
@@ -1738,12 +1739,13 @@ static int vidioc_s_parm(struct file *filp, void *priv,
 
 		if (mutex_lock_interruptible(&gspca_dev->usb_lock))
 			return -ERESTARTSYS;
-		gspca_dev->usb_err = 0;
-		if (gspca_dev->present)
-			ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
-								 parm);
-		else
+		if (gspca_dev->present) {
+			gspca_dev->usb_err = 0;
+			gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
+			ret = gspca_dev->usb_err;
+		} else {
 			ret = -ENODEV;
+		}
 		mutex_unlock(&gspca_dev->usb_lock);
 		return ret;
 	}

drivers/media/video/gspca/gspca.h

@@ -93,7 +93,7 @@ typedef int (*cam_reg_op) (struct gspca_dev *,
 				struct v4l2_dbg_register *);
 typedef int (*cam_ident_op) (struct gspca_dev *,
 				struct v4l2_dbg_chip_ident *);
-typedef int (*cam_streamparm_op) (struct gspca_dev *,
+typedef void (*cam_streamparm_op) (struct gspca_dev *,
 				  struct v4l2_streamparm *);
 typedef int (*cam_qmnu_op) (struct gspca_dev *,
 			struct v4l2_querymenu *);

drivers/media/video/gspca/ov534.c

@@ -1243,34 +1243,26 @@ static int sd_querymenu(struct gspca_dev *gspca_dev,
 }
 
 /* get stream parameters (framerate) */
-static int sd_get_streamparm(struct gspca_dev *gspca_dev,
+static void sd_get_streamparm(struct gspca_dev *gspca_dev,
 			     struct v4l2_streamparm *parm)
 {
 	struct v4l2_captureparm *cp = &parm->parm.capture;
 	struct v4l2_fract *tpf = &cp->timeperframe;
 	struct sd *sd = (struct sd *) gspca_dev;
 
-	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
 	cp->capability |= V4L2_CAP_TIMEPERFRAME;
 	tpf->numerator = 1;
 	tpf->denominator = sd->frame_rate;
-
-	return 0;
 }
 
 /* set stream parameters (framerate) */
-static int sd_set_streamparm(struct gspca_dev *gspca_dev,
+static void sd_set_streamparm(struct gspca_dev *gspca_dev,
 			     struct v4l2_streamparm *parm)
 {
 	struct v4l2_captureparm *cp = &parm->parm.capture;
 	struct v4l2_fract *tpf = &cp->timeperframe;
 	struct sd *sd = (struct sd *) gspca_dev;
 
-	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-		return -EINVAL;
-
 	/* Set requested framerate */
 	sd->frame_rate = tpf->denominator / tpf->numerator;
 	if (gspca_dev->streaming)
@@ -1279,8 +1271,6 @@ static int sd_set_streamparm(struct gspca_dev *gspca_dev,
 	/* Return the actual framerate */
 	tpf->numerator = 1;
 	tpf->denominator = sd->frame_rate;
-
-	return 0;
 }
 
 /* sub-driver description */