diff options
| author | Alex Hung <[email protected]> | 2024-06-08 04:09:53 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2024-07-01 20:06:53 +0000 |
| commit | bbd0d1c942cbac87404ed2bca0aa4f7907b8f47f (patch) | |
| tree | b5d6ff653f2dab7da511791b8ae020b9081dc842 /drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c | |
| parent | drm/amd/display: Add ASIC cap to limit DCC surface width (diff) | |
| download | kernel-bbd0d1c942cbac87404ed2bca0aa4f7907b8f47f.tar.gz kernel-bbd0d1c942cbac87404ed2bca0aa4f7907b8f47f.zip | |
drm/amd/display: Fix possible overflow in integer multiplication
[WHAT & HOW]
Integer multiplies integer may overflow in context that expects an
expression of unsigned/siged long long (64 bits). This can be fixed
by casting integer to unsigned/siged long long to force 64 bits results.
This fixes 26 OVERFLOW_BEFORE_WIDEN issues reported by Coverity.
Reviewed-by: Harry Wentland <[email protected]>
Signed-off-by: Jerry Zuo <[email protected]>
Signed-off-by: Alex Hung <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c index b30c2cdc1a61..e47e9db062f4 100644 --- a/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c +++ b/drivers/gpu/drm/amd/display/dc/basics/dce_calcs.c @@ -1853,7 +1853,7 @@ static void calculate_bandwidth( /*compute total time to request one chunk from each active display pipe*/ for (i = 0; i <= maximum_number_of_surfaces - 1; i++) { if (data->enable[i]) { - data->chunk_request_time = bw_add(data->chunk_request_time, (bw_div((bw_div(bw_int_to_fixed(pixels_per_chunk * data->bytes_per_pixel[i]), data->useful_bytes_per_request[i])), bw_min2(sclk[data->sclk_level], bw_div(data->dispclk, bw_int_to_fixed(2)))))); + data->chunk_request_time = bw_add(data->chunk_request_time, (bw_div((bw_div(bw_int_to_fixed(pixels_per_chunk * (int64_t)data->bytes_per_pixel[i]), data->useful_bytes_per_request[i])), bw_min2(sclk[data->sclk_level], bw_div(data->dispclk, bw_int_to_fixed(2)))))); } } /*compute total time to request cursor data*/ |