[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>
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 03381c6..92b5dfb 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1708,12 +1708,13 @@
 
 		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 @@
 
 		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;
 	}