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drm/amd/display: fix potential infinite loop in fbc path

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- Fixing integer overflow bug in wait_for_fbc_state_changed()
- Correct the max value of retries for the corresponding warning

Signed-off-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li 2018-06-05 14:24:53 -04:00 • committed by Alex Deucher
parent d4fa93e038
commit 6f66ccf0aa
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
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@ -143,7 +143,7 @@ static void wait_for_fbc_state_changed(
struct dce110_compressor *cp110,
bool enabled)
{
uint16_t counter = 0;
uint32_t counter = 0;
uint32_t addr = mmFBC_STATUS;
uint32_t value;
@ -158,7 +158,7 @@ static void wait_for_fbc_state_changed(
counter++;
}
if (counter == 10) {
if (counter == 1000) {
DC_LOG_WARNING("%s: wait counter exceeded, changes to HW not applied",
__func__);
} else {