diff options
| author | Vladimir Lypak <junak.pub@gmail.com> | 2021-02-18 01:11:34 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-03-11 13:59:43 +0300 |
| commit | 2f90857781bb6e73666fdec2293b7f81cd2a0805 (patch) | |
| tree | c39d407ddc59869c5f57349c3635b6de13c9135d | |
| parent | 78c2cc28df4a1f6f971d455da9b70d5540bd3de8 (diff) | |
| download | linux-2f90857781bb6e73666fdec2293b7f81cd2a0805.tar.xz | |
media: qcom: camss: Fix overflows in clock rate calculations
Because of u32 type being used to store pixel clock rate, expression used
to calculate pipeline clocks (pixel_clock * bpp) produces wrong value due
to integer overflow. This patch changes data type used to store, pass and
retrieve pixel_clock from u32 to u64 to make this mistake less likely to
be repeated in the future.
Signed-off-by: Vladimir Lypak <junak.pub@gmail.com>
Acked-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss-vfe.c | 4 | ||||
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss.c | 2 | ||||
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss.h | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c index fae2b513b2f9..b2c95b46ce66 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe.c +++ b/drivers/media/platform/qcom/camss/camss-vfe.c @@ -1112,7 +1112,7 @@ static inline void vfe_isr_halt_ack(struct vfe_device *vfe) static int vfe_set_clock_rates(struct vfe_device *vfe) { struct device *dev = vfe->camss->dev; - u32 pixel_clock[MSM_VFE_LINE_NUM]; + u64 pixel_clock[MSM_VFE_LINE_NUM]; int i, j; int ret; @@ -1194,7 +1194,7 @@ static int vfe_set_clock_rates(struct vfe_device *vfe) */ static int vfe_check_clock_rates(struct vfe_device *vfe) { - u32 pixel_clock[MSM_VFE_LINE_NUM]; + u64 pixel_clock[MSM_VFE_LINE_NUM]; int i, j; int ret; diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index eb8fb8c34acd..d82bbc2213a6 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -578,7 +578,7 @@ s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, * * Return 0 on success or a negative error code otherwise */ -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock) +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock) { struct media_entity *sensor; struct v4l2_subdev *subdev; diff --git a/drivers/media/platform/qcom/camss/camss.h b/drivers/media/platform/qcom/camss/camss.h index 86cdc25189eb..e29466d07ad2 100644 --- a/drivers/media/platform/qcom/camss/camss.h +++ b/drivers/media/platform/qcom/camss/camss.h @@ -110,7 +110,7 @@ void camss_disable_clocks(int nclocks, struct camss_clock *clock); struct media_entity *camss_find_sensor(struct media_entity *entity); s64 camss_get_link_freq(struct media_entity *entity, unsigned int bpp, unsigned int lanes); -int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock); +int camss_get_pixel_clock(struct media_entity *entity, u64 *pixel_clock); int camss_pm_domain_on(struct camss *camss, int id); void camss_pm_domain_off(struct camss *camss, int id); void camss_delete(struct camss *camss); |