From 749d896551df2ae6996aab51c25bbb3ecd589774 Mon Sep 17 00:00:00 2001 From: Tom Rix Date: Wed, 18 Aug 2021 21:41:05 +0200 Subject: [PATCH] media: camss: vfe: simplify vfe_get_wm_sizes() Static analysis reports this representative problem camss-vfe-4-1.c:333: The result of the left shift is undefined because the left operand is negative reg |= (height - 1) << 4; ~~~~~~~~~ ^ The is a false positive. height is set in vfe_get_wm_sizes() which has a switch statement without a default. Reviewing the switch, the cases contain redundant assignments. So simplify to assignments. Signed-off-by: Tom Rix Reviewed-by: Robert Foss Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/qcom/camss/camss-vfe-4-1.c | 20 ++++++-------------- drivers/media/platform/qcom/camss/camss-vfe-4-7.c | 10 +++------- drivers/media/platform/qcom/camss/camss-vfe-4-8.c | 9 +++------ 3 files changed, 12 insertions(+), 27 deletions(-) diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c index 7b7c9a0..42047b1 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe-4-1.c +++ b/drivers/media/platform/qcom/camss/camss-vfe-4-1.c @@ -290,22 +290,14 @@ static void vfe_wm_frame_based(struct vfe_device *vfe, u8 wm, u8 enable) static void vfe_get_wm_sizes(struct v4l2_pix_format_mplane *pix, u8 plane, u16 *width, u16 *height, u16 *bytesperline) { - switch (pix->pixelformat) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - *width = pix->width; - *height = pix->height; - *bytesperline = pix->plane_fmt[0].bytesperline; + *width = pix->width; + *height = pix->height; + *bytesperline = pix->plane_fmt[0].bytesperline; + + if (pix->pixelformat == V4L2_PIX_FMT_NV12 || + pix->pixelformat == V4L2_PIX_FMT_NV21) if (plane == 1) *height /= 2; - break; - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - *width = pix->width; - *height = pix->height; - *bytesperline = pix->plane_fmt[0].bytesperline; - break; - } } static void vfe_wm_line_based(struct vfe_device *vfe, u32 wm, diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c index 2836b12..ab2d57b 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe-4-7.c +++ b/drivers/media/platform/qcom/camss/camss-vfe-4-7.c @@ -370,30 +370,26 @@ static int vfe_word_per_line_by_bytes(u32 bytes_per_line) static void vfe_get_wm_sizes(struct v4l2_pix_format_mplane *pix, u8 plane, u16 *width, u16 *height, u16 *bytesperline) { + *width = pix->width; + *height = pix->height; + switch (pix->pixelformat) { case V4L2_PIX_FMT_NV12: case V4L2_PIX_FMT_NV21: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[0].bytesperline; if (plane == 1) *height /= 2; break; case V4L2_PIX_FMT_NV16: case V4L2_PIX_FMT_NV61: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[0].bytesperline; break; case V4L2_PIX_FMT_YUYV: case V4L2_PIX_FMT_YVYU: case V4L2_PIX_FMT_VYUY: case V4L2_PIX_FMT_UYVY: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[plane].bytesperline; break; - } } diff --git a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c index 1951923..7e6b62c 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe-4-8.c +++ b/drivers/media/platform/qcom/camss/camss-vfe-4-8.c @@ -343,27 +343,24 @@ static int vfe_word_per_line_by_bytes(u32 bytes_per_line) static void vfe_get_wm_sizes(struct v4l2_pix_format_mplane *pix, u8 plane, u16 *width, u16 *height, u16 *bytesperline) { + *width = pix->width; + *height = pix->height; + switch (pix->pixelformat) { case V4L2_PIX_FMT_NV12: case V4L2_PIX_FMT_NV21: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[0].bytesperline; if (plane == 1) *height /= 2; break; case V4L2_PIX_FMT_NV16: case V4L2_PIX_FMT_NV61: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[0].bytesperline; break; case V4L2_PIX_FMT_YUYV: case V4L2_PIX_FMT_YVYU: case V4L2_PIX_FMT_VYUY: case V4L2_PIX_FMT_UYVY: - *width = pix->width; - *height = pix->height; *bytesperline = pix->plane_fmt[plane].bytesperline; break; } -- 2.7.4