[PATCH AUTOSEL 6.10 014/121] drm/amd/display: Fix incorrect size calculation for loop

Sasha Levin
2024-08-01T00:09:53Z

From: Alex Hung <alex.hung@amd.com>

[ Upstream commit 3941a3aa4b653b69876d894d08f3fff1cc965267 ]

[WHY]
fe_clk_en has size of 5 but sizeof(fe_clk_en) has byte size 20 which is
lager than the array size.

[HOW]
Divide byte size 20 by its element size.

This fixes 2 OVERRUN issues reported by Coverity.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/display/dc/dcn35/dcn35_dccg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_dccg.c
index 024dcf3057a05..f2379709dd941 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn35/dcn35_dccg.c
@@ -895,7 +895,7 @@ static uint8_t dccg35_get_other_enabled_symclk_fe(struct dccg *dccg, uint32_t st
/* for DPMST, this backend could be used by multiple front end.
only disable the backend if this stream_enc_ins is the last active stream enc connected to this back_end*/
uint8_t i;
- for (i = 0; i != link_enc_inst && i < sizeof(fe_clk_en); i++) {
+ for (i = 0; i != link_enc_inst && i < ARRAY_SIZE(fe_clk_en); i++) {
if (fe_clk_en[i] && be_clk_sel[i] == link_enc_inst)
num_enabled_symclk_fe++;
}
--
2.43.0