From: Colin King <colin.king@canonical.com> To: Mirela Rabulea <mirela.rabulea@nxp.com>, NXP Linux Team <linux-imx@nxp.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix Kernel Team <kernel@pengutronix.de>, Fabio Estevam <festevam@gmail.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] media: imx-jpeg: Pass the v4l2_jpeg_header header argument by reference Date: Tue, 23 Mar 2021 14:24:21 +0000 [thread overview] Message-ID: <20210323142421.348695-1-colin.king@canonical.com> (raw) 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
WARNING: multiple messages have this Message-ID (diff)
From: Colin King <colin.king@canonical.com> To: Mirela Rabulea <mirela.rabulea@nxp.com>, NXP Linux Team <linux-imx@nxp.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix Kernel Team <kernel@pengutronix.de>, Fabio Estevam <festevam@gmail.com>, Hans Verkuil <hverkuil-cisco@xs4all.nl>, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] media: imx-jpeg: Pass the v4l2_jpeg_header header argument by reference Date: Tue, 23 Mar 2021 14:24:21 +0000 [thread overview] Message-ID: <20210323142421.348695-1-colin.king@canonical.com> (raw) 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-03-23 14:25 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-23 14:24 Colin King [this message] 2021-03-23 14:24 ` [PATCH][next] media: imx-jpeg: Pass the v4l2_jpeg_header header argument by reference Colin King 2021-03-27 14:32 ` [EXT] " Mirela Rabulea 2021-03-27 14:32 ` Mirela Rabulea
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