| Message ID | 20210323142421.348695-1-colin.king@canonical.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [next] media: imx-jpeg: Pass the v4l2_jpeg_header header argument by reference | expand |
Hi, On Tue, 2021-03-23 at 14:24 +0000, Colin King wrote: > > From: Colin Ian King <colin.king@canonical.com> > > Currently the header argument is being passed by value, so a copy of > 256 > byte structure on the stack is potentially occurring. Fix this by > passing > by reference to avoid any large stack copies. > > Addresses-Coverity: ("Big parameter passed by value") > Fixes: 2db16c6ed72c ("media: imx-jpeg: Add V4L2 driver for i.MX8 JPEG > Encoder/Decoder") > Signed-off-by: Colin Ian King <colin.king@canonical.com> > --- > drivers/media/platform/imx-jpeg/mxc-jpeg.c | 14 +++++++------- > 1 file changed, 7 insertions(+), 7 deletions(-) > > diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c > b/drivers/media/platform/imx-jpeg/mxc-jpeg.c > index adb1715c75d7..f13a8efc35ad 100644 > --- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c > +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c > @@ -1114,21 +1114,21 @@ static int mxc_jpeg_valid_comp_id(struct > device *dev, > } > > static u32 mxc_jpeg_get_image_format(struct device *dev, > - const struct v4l2_jpeg_header > header) > + const struct v4l2_jpeg_header > *header) > { > int i; > u32 fourcc = 0; > > for (i = 0; i < MXC_JPEG_NUM_FORMATS; i++) > - if (mxc_formats[i].subsampling == > header.frame.subsampling && > - mxc_formats[i].nc == header.frame.num_components) > { > + if (mxc_formats[i].subsampling == header- > >frame.subsampling && > + mxc_formats[i].nc == header- > >frame.num_components) { > fourcc = mxc_formats[i].fourcc; > break; > } > if (fourcc == 0) { > dev_err(dev, "Could not identify image format nc=%d, > subsampling=%d\n", > - header.frame.num_components, > - header.frame.subsampling); > + header->frame.num_components, > + header->frame.subsampling); > return fourcc; > } > /* > @@ -1137,7 +1137,7 @@ static u32 mxc_jpeg_get_image_format(struct > device *dev, > * ITU-T T.872 chapter 6.5.3 APP14 marker segment for colour > encoding > */ > if (fourcc == V4L2_PIX_FMT_YUV24 || fourcc == > V4L2_PIX_FMT_RGB24) { > - if (header.app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) > + if (header->app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) > fourcc = V4L2_PIX_FMT_RGB24; > else > fourcc = V4L2_PIX_FMT_YUV24; > @@ -1258,7 +1258,7 @@ static int mxc_jpeg_parse(struct mxc_jpeg_ctx > *ctx, > if (!mxc_jpeg_valid_comp_id(dev, psof, psos)) > dev_warn(dev, "JPEG component ids should be 0-3 or 1- > 4"); > > - fourcc = mxc_jpeg_get_image_format(dev, header); > + fourcc = mxc_jpeg_get_image_format(dev, &header); > if (fourcc == 0) > return -EINVAL; > > -- > 2.30.2 > Thanks for the patch. Reviewed-by: Mirela Rabulea <mirela.rabulea@nxp.com> Regards, Mirela
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c index adb1715c75d7..f13a8efc35ad 100644 --- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c @@ -1114,21 +1114,21 @@ static int mxc_jpeg_valid_comp_id(struct device *dev, } static u32 mxc_jpeg_get_image_format(struct device *dev, - const struct v4l2_jpeg_header header) + const struct v4l2_jpeg_header *header) { int i; u32 fourcc = 0; for (i = 0; i < MXC_JPEG_NUM_FORMATS; i++) - if (mxc_formats[i].subsampling == header.frame.subsampling && - mxc_formats[i].nc == header.frame.num_components) { + if (mxc_formats[i].subsampling == header->frame.subsampling && + mxc_formats[i].nc == header->frame.num_components) { fourcc = mxc_formats[i].fourcc; break; } if (fourcc == 0) { dev_err(dev, "Could not identify image format nc=%d, subsampling=%d\n", - header.frame.num_components, - header.frame.subsampling); + header->frame.num_components, + header->frame.subsampling); return fourcc; } /* @@ -1137,7 +1137,7 @@ static u32 mxc_jpeg_get_image_format(struct device *dev, * ITU-T T.872 chapter 6.5.3 APP14 marker segment for colour encoding */ if (fourcc == V4L2_PIX_FMT_YUV24 || fourcc == V4L2_PIX_FMT_RGB24) { - if (header.app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) + if (header->app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) fourcc = V4L2_PIX_FMT_RGB24; else fourcc = V4L2_PIX_FMT_YUV24; @@ -1258,7 +1258,7 @@ static int mxc_jpeg_parse(struct mxc_jpeg_ctx *ctx, if (!mxc_jpeg_valid_comp_id(dev, psof, psos)) dev_warn(dev, "JPEG component ids should be 0-3 or 1-4"); - fourcc = mxc_jpeg_get_image_format(dev, header); + fourcc = mxc_jpeg_get_image_format(dev, &header); if (fourcc == 0) return -EINVAL;