diff --git a/drivers/media/pci/zoran/zoran_driver.c b/drivers/media/pci/zoran/zoran_driver.c
index f91b551..9ecd7d7 100644
--- a/drivers/media/pci/zoran/zoran_driver.c
+++ b/drivers/media/pci/zoran/zoran_driver.c
@@ -2674,7 +2674,7 @@
 }
 
 static int zoran_s_jpegcomp(struct file *file, void *__fh,
-					struct v4l2_jpegcompression *params)
+					const struct v4l2_jpegcompression *params)
 {
 	struct zoran_fh *fh = __fh;
 	struct zoran *zr = fh->zr;
@@ -2701,7 +2701,7 @@
 	if (!fh->buffers.allocated)
 		fh->buffers.buffer_size =
 			zoran_v4l2_calc_bufsize(&fh->jpg_settings);
-	fh->jpg_settings.jpg_comp = *params = settings.jpg_comp;
+	fh->jpg_settings.jpg_comp = settings.jpg_comp;
 sjpegc_unlock_and_return:
 	mutex_unlock(&zr->resource_lock);
 
diff --git a/drivers/media/usb/cpia2/cpia2_v4l.c b/drivers/media/usb/cpia2/cpia2_v4l.c
index 5ca6f44..aeb9d22 100644
--- a/drivers/media/usb/cpia2/cpia2_v4l.c
+++ b/drivers/media/usb/cpia2/cpia2_v4l.c
@@ -734,7 +734,8 @@
  *
  *****************************************************************************/
 
-static int cpia2_s_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
+static int cpia2_s_jpegcomp(struct file *file, void *fh,
+		const struct v4l2_jpegcompression *parms)
 {
 	struct camera_data *cam = video_drvdata(file);
 
@@ -743,8 +744,6 @@
 
 	cam->params.compression.inhibit_htables =
 		!(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
-	parms->jpeg_markers &= V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI |
-			       V4L2_JPEG_MARKER_DHT;
 
 	if(parms->APP_len != 0) {
 		if(parms->APP_len > 0 &&
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index 2abbf52..a2b9341 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1686,7 +1686,7 @@
 }
 
 static int vidioc_s_jpegcomp(struct file *file, void *priv,
-			struct v4l2_jpegcompression *jpegcomp)
+			const struct v4l2_jpegcompression *jpegcomp)
 {
 	struct gspca_dev *gspca_dev = video_drvdata(file);
 
diff --git a/drivers/media/usb/gspca/gspca.h b/drivers/media/usb/gspca/gspca.h
index dc688c7..e3eab82 100644
--- a/drivers/media/usb/gspca/gspca.h
+++ b/drivers/media/usb/gspca/gspca.h
@@ -83,8 +83,10 @@
 typedef int (*cam_op) (struct gspca_dev *);
 typedef void (*cam_v_op) (struct gspca_dev *);
 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
-typedef int (*cam_jpg_op) (struct gspca_dev *,
+typedef int (*cam_get_jpg_op) (struct gspca_dev *,
 				struct v4l2_jpegcompression *);
+typedef int (*cam_set_jpg_op) (struct gspca_dev *,
+				const struct v4l2_jpegcompression *);
 typedef int (*cam_reg_op) (struct gspca_dev *,
 				struct v4l2_dbg_register *);
 typedef int (*cam_ident_op) (struct gspca_dev *,
@@ -126,8 +128,8 @@
 	cam_v_op stopN;		/* called on stream off - main alt */
 	cam_v_op stop0;		/* called on stream off & disconnect - alt 0 */
 	cam_v_op dq_callback;	/* called when a frame has been dequeued */
-	cam_jpg_op get_jcomp;
-	cam_jpg_op set_jcomp;
+	cam_get_jpg_op get_jcomp;
+	cam_set_jpg_op set_jcomp;
 	cam_qmnu_op querymenu;
 	cam_streamparm_op get_streamparm;
 	cam_streamparm_op set_streamparm;
diff --git a/drivers/media/usb/gspca/jeilinj.c b/drivers/media/usb/gspca/jeilinj.c
index 26b9931..b897aa8 100644
--- a/drivers/media/usb/gspca/jeilinj.c
+++ b/drivers/media/usb/gspca/jeilinj.c
@@ -474,7 +474,7 @@
 }
 
 static int sd_set_jcomp(struct gspca_dev *gspca_dev,
-			struct v4l2_jpegcompression *jcomp)
+			const struct v4l2_jpegcompression *jcomp)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
diff --git a/drivers/media/usb/gspca/ov519.c b/drivers/media/usb/gspca/ov519.c
index c1a21bf..9aa09f8 100644
--- a/drivers/media/usb/gspca/ov519.c
+++ b/drivers/media/usb/gspca/ov519.c
@@ -4762,7 +4762,7 @@
 }
 
 static int sd_set_jcomp(struct gspca_dev *gspca_dev,
-			struct v4l2_jpegcompression *jcomp)
+			const struct v4l2_jpegcompression *jcomp)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
diff --git a/drivers/media/usb/gspca/topro.c b/drivers/media/usb/gspca/topro.c
index a605524..4cb511c 100644
--- a/drivers/media/usb/gspca/topro.c
+++ b/drivers/media/usb/gspca/topro.c
@@ -4806,7 +4806,7 @@
 }
 
 static int sd_set_jcomp(struct gspca_dev *gspca_dev,
-			struct v4l2_jpegcompression *jcomp)
+			const struct v4l2_jpegcompression *jcomp)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
diff --git a/drivers/media/usb/gspca/zc3xx.c b/drivers/media/usb/gspca/zc3xx.c
index c47ba14..77c5775 100644
--- a/drivers/media/usb/gspca/zc3xx.c
+++ b/drivers/media/usb/gspca/zc3xx.c
@@ -6883,16 +6883,11 @@
 }
 
 static int sd_set_jcomp(struct gspca_dev *gspca_dev,
-			struct v4l2_jpegcompression *jcomp)
+			const struct v4l2_jpegcompression *jcomp)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
-	int ret;
 
-	ret = v4l2_ctrl_s_ctrl(sd->jpegqual, jcomp->quality);
-	if (ret)
-		return ret;
-	jcomp->quality = v4l2_ctrl_g_ctrl(sd->jpegqual);
-	return 0;
+	return v4l2_ctrl_s_ctrl(sd->jpegqual, jcomp->quality);
 }
 
 static int sd_get_jcomp(struct gspca_dev *gspca_dev,
diff --git a/drivers/media/usb/s2255/s2255drv.c b/drivers/media/usb/s2255/s2255drv.c
index a25513d..2191f6d 100644
--- a/drivers/media/usb/s2255/s2255drv.c
+++ b/drivers/media/usb/s2255/s2255drv.c
@@ -1556,7 +1556,7 @@
 }
 
 static int vidioc_s_jpegcomp(struct file *file, void *priv,
-			 struct v4l2_jpegcompression *jc)
+			 const struct v4l2_jpegcompression *jc)
 {
 	struct s2255_fh *fh = priv;
 	struct s2255_channel *channel = fh->channel;
diff --git a/drivers/staging/media/go7007/go7007-v4l2.c b/drivers/staging/media/go7007/go7007-v4l2.c
index c184ad3..f1dff3d 100644
--- a/drivers/staging/media/go7007/go7007-v4l2.c
+++ b/drivers/staging/media/go7007/go7007-v4l2.c
@@ -1392,7 +1392,7 @@
 }
 
 static int vidioc_s_jpegcomp(struct file *file, void *priv,
-			 struct v4l2_jpegcompression *params)
+			 const struct v4l2_jpegcompression *params)
 {
 	if (params->quality != 50 ||
 			params->jpeg_markers != (V4L2_JPEG_MARKER_DHT |
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
index 73ae24a..21f6245 100644
--- a/include/media/v4l2-ioctl.h
+++ b/include/media/v4l2-ioctl.h
@@ -195,7 +195,7 @@
 	int (*vidioc_g_jpegcomp)       (struct file *file, void *fh,
 					struct v4l2_jpegcompression *a);
 	int (*vidioc_s_jpegcomp)       (struct file *file, void *fh,
-					struct v4l2_jpegcompression *a);
+					const struct v4l2_jpegcompression *a);
 	int (*vidioc_g_enc_index)      (struct file *file, void *fh,
 					struct v4l2_enc_idx *a);
 	int (*vidioc_encoder_cmd)      (struct file *file, void *fh,