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| author |   Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-08-11 19:08:01 -0500 |
|---|---|---|
| committer |   james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-08-12 19:28:49 +0800 |
| commit | c550b60c647941b581e4b0f4f2b1526b34f4a8e5 (patch) | |
| tree | 45fd962906daf4289accc9cbb2f6bcd308a87b5c /drivers/gpu/drm/arm | |
| parent | dma-fence: Report the composite sync_file status (diff) | |
| download | linux-dev-c550b60c647941b581e4b0f4f2b1526b34f4a8e5.tar.xz linux-dev-c550b60c647941b581e4b0f4f2b1526b34f4a8e5.zip | |
drm/komeda: Fix potential integer overflow in komeda_crtc_update_clock_ratio
Add suffix ULL to constant 1000 in order to avoid a potential integer
overflow and give the compiler complete information about the proper
arithmetic to use. Notice that this constant is being used in a context
that expects an expression of type u64, but it's currently evaluated
using 32-bit arithmetic.
Addresses-Coverity-ID: 1485796 ("Unintentional integer overflow")
Fixes: ed22c6d9304d ("drm/komeda: Use drm_display_mode "crtc_" prefixed hardware timings")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190812000801.GA29204@embeddedor
Diffstat (limited to 'drivers/gpu/drm/arm')
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_crtc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c index fa9a4593bb37..624d257da20f 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c @@ -27,7 +27,7 @@ static void komeda_crtc_update_clock_ratio(struct komeda_crtc_state *kcrtc_st) return; } - pxlclk = kcrtc_st->base.adjusted_mode.crtc_clock * 1000; + pxlclk = kcrtc_st->base.adjusted_mode.crtc_clock * 1000ULL; aclk = komeda_crtc_get_aclk(kcrtc_st); kcrtc_st->clock_ratio = div64_u64(aclk << 32, pxlclk); |