The priv field of struct v4l2_pix_format shouldn't be set by drivers,
it's set by the v4l2 core instead to V4L2_PIX_FMT_PRIV_MAGIC.

Drop this from the few media drivers that still do this.

Note that the gspca patch is slightly more involved since some of the
sub-gspca drivers use the priv field internally.

Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
---
diff --git a/drivers/media/pci/cobalt/cobalt-v4l2.c 
b/drivers/media/pci/cobalt/cobalt-v4l2.c
index 39dabd4da60f..c8cd4c407540 100644
--- a/drivers/media/pci/cobalt/cobalt-v4l2.c
+++ b/drivers/media/pci/cobalt/cobalt-v4l2.c
@@ -788,7 +788,6 @@ static int cobalt_try_fmt_vid_cap(struct file *file, void 
*priv_fh,

        pix->sizeimage = pix->bytesperline * pix->height;
        pix->field = V4L2_FIELD_NONE;
-       pix->priv = 0;

        return 0;
 }
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c 
b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
index 609100a46ff8..88e0cb0bf592 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
@@ -886,7 +886,6 @@ static int solo_enc_try_fmt_cap(struct file *file, void 
*priv,
        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
        pix->sizeimage = FRAME_BUF_SIZE;
        pix->bytesperline = 0;
-       pix->priv = 0;

        return 0;
 }
@@ -941,7 +940,6 @@ static int solo_enc_get_fmt_cap(struct file *file, void 
*priv,
                     V4L2_FIELD_NONE;
        pix->sizeimage = FRAME_BUF_SIZE;
        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
-       pix->priv = 0;

        return 0;
 }
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2.c 
b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
index a968f75920b5..a670fe8e4f9c 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2.c
@@ -479,7 +479,6 @@ static int solo_try_fmt_cap(struct file *file, void *priv,
        pix->field = V4L2_FIELD_INTERLACED;
        pix->pixelformat = V4L2_PIX_FMT_UYVY;
        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
-       pix->priv = 0;
        return 0;
 }

@@ -509,7 +508,6 @@ static int solo_get_fmt_cap(struct file *file, void *priv,
        pix->sizeimage = solo_image_size(solo_dev);
        pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
        pix->bytesperline = solo_bytesperline(solo_dev);
-       pix->priv = 0;

        return 0;
 }
diff --git a/drivers/media/pci/tw68/tw68-video.c 
b/drivers/media/pci/tw68/tw68-video.c
index 8e0952d65ad4..d0c2ec70f9cd 100644
--- a/drivers/media/pci/tw68/tw68-video.c
+++ b/drivers/media/pci/tw68/tw68-video.c
@@ -592,7 +592,6 @@ static int tw68_g_fmt_vid_cap(struct file *file, void *priv,
        f->fmt.pix.sizeimage =
                f->fmt.pix.height * f->fmt.pix.bytesperline;
        f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
-       f->fmt.pix.priv = 0;
        return 0;
 }

diff --git a/drivers/media/platform/davinci/vpif_capture.c 
b/drivers/media/platform/davinci/vpif_capture.c
index f0f7ef638c56..21a2ba797d0a 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -979,7 +979,6 @@ static int vpif_try_fmt_vid_cap(struct file *file, void 
*priv,
                pixfmt->bytesperline = common->fmt.fmt.pix.width * 2;
                pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
        }
-       pixfmt->priv = 0;

        dev_dbg(vpif_dev, "%s: %d x %d; pitch=%d pixelformat=0x%08x, field=%d, 
size=%d\n", __func__,
                pixfmt->width, pixfmt->height,
diff --git a/drivers/media/usb/au0828/au0828-video.c 
b/drivers/media/usb/au0828/au0828-video.c
index 5e00019bce8a..37acfcb56822 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -1153,7 +1153,6 @@ static int au0828_set_format(struct au0828_dev *dev, 
unsigned int cmd,
        format->fmt.pix.sizeimage = width * height * 2;
        format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
        format->fmt.pix.field = V4L2_FIELD_INTERLACED;
-       format->fmt.pix.priv = 0;

        if (cmd == VIDIOC_TRY_FMT)
                return 0;
@@ -1231,7 +1230,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void 
*priv,
        f->fmt.pix.sizeimage = dev->frame_size;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
        f->fmt.pix.field = V4L2_FIELD_INTERLACED;
-       f->fmt.pix.priv = 0;
        return 0;
 }

diff --git a/drivers/media/usb/cpia2/cpia2_v4l.c 
b/drivers/media/usb/cpia2/cpia2_v4l.c
index 0feae825cebb..9232461669c8 100644
--- a/drivers/media/usb/cpia2/cpia2_v4l.c
+++ b/drivers/media/usb/cpia2/cpia2_v4l.c
@@ -338,7 +338,6 @@ static int cpia2_try_fmt_vid_cap(struct file *file, void 
*fh,
        f->fmt.pix.bytesperline = 0;
        f->fmt.pix.sizeimage = cam->frame_size;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
-       f->fmt.pix.priv = 0;

        switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
        case VIDEOSIZE_VGA:
@@ -449,7 +448,6 @@ static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
        f->fmt.pix.bytesperline = 0;
        f->fmt.pix.sizeimage = cam->frame_size;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
-       f->fmt.pix.priv = 0;

        return 0;
 }
diff --git a/drivers/media/usb/em28xx/em28xx-video.c 
b/drivers/media/usb/em28xx/em28xx-video.c
index 0512e1959394..9a6956813259 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1517,7 +1517,6 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void 
*priv,
        else
                f->fmt.pix.field = v4l2->interlaced_fieldmode ?
                           V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
-       f->fmt.pix.priv = 0;

        return 0;
 }
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index be11f7830bca..072d280c1824 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1040,11 +1040,11 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void 
*priv,
                            struct v4l2_format *fmt)
 {
        struct gspca_dev *gspca_dev = video_drvdata(file);
+       u32 priv = fmt->fmt.pix.priv;

        fmt->fmt.pix = gspca_dev->pixfmt;
-       /* some drivers use priv internally, zero it before giving it back to
-          the core */
-       fmt->fmt.pix.priv = 0;
+       /* some drivers use priv internally, so keep the original value */
+       fmt->fmt.pix.priv = priv;
        return 0;
 }

@@ -1079,9 +1079,6 @@ static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
                fmt->fmt.pix.height = h;
                gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
        }
-       /* some drivers use priv internally, zero it before giving it back to
-          the core */
-       fmt->fmt.pix.priv = 0;
        return mode;                    /* used when s_fmt */
 }

@@ -1090,9 +1087,12 @@ static int vidioc_try_fmt_vid_cap(struct file *file,
                              struct v4l2_format *fmt)
 {
        struct gspca_dev *gspca_dev = video_drvdata(file);
+       u32 priv = fmt->fmt.pix.priv;

        if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
                return -EINVAL;
+       /* some drivers use priv internally, so keep the original value */
+       fmt->fmt.pix.priv = priv;
        return 0;
 }

@@ -1100,6 +1100,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void 
*priv,
                            struct v4l2_format *fmt)
 {
        struct gspca_dev *gspca_dev = video_drvdata(file);
+       u32 priv = fmt->fmt.pix.priv;
        int mode;

        if (vb2_is_busy(&gspca_dev->queue))
@@ -1115,6 +1116,8 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void 
*priv,
                gspca_dev->pixfmt = fmt->fmt.pix;
        else
                gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
+       /* some drivers use priv internally, so keep the original value */
+       fmt->fmt.pix.priv = priv;
        return 0;
 }

diff --git a/drivers/media/usb/s2255/s2255drv.c 
b/drivers/media/usb/s2255/s2255drv.c
index aa90558479f7..1a5b46c6992b 100644
--- a/drivers/media/usb/s2255/s2255drv.c
+++ b/drivers/media/usb/s2255/s2255drv.c
@@ -759,7 +759,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void 
*priv,
        f->fmt.pix.bytesperline = f->fmt.pix.width * (vc->fmt->depth >> 3);
        f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
-       f->fmt.pix.priv = 0;
        return 0;
 }

@@ -811,7 +810,6 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void 
*priv,
        f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
        f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
-       f->fmt.pix.priv = 0;
        dprintk(vc->dev, 50, "%s: set width %d height %d field %d\n", __func__,
                f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.field);
        return 0;
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 203329cadbc4..0335e69b70ab 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -253,7 +253,6 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream,
        fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
        fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
        fmt->fmt.pix.colorspace = format->colorspace;
-       fmt->fmt.pix.priv = 0;

        if (uvc_format != NULL)
                *uvc_format = format;
@@ -290,7 +289,6 @@ static int uvc_v4l2_get_format(struct uvc_streaming *stream,
        fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
        fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
        fmt->fmt.pix.colorspace = format->colorspace;
-       fmt->fmt.pix.priv = 0;

 done:
        mutex_unlock(&stream->mutex);

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