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From 7a13914aacf6b31f699f3eb83b8510884a6426e4 Mon Sep 17 00:00:00 2001
From: Roman Li <Roman.Li@amd.com>
Date: Tue, 5 Jun 2018 14:24:53 -0400
Subject: [PATCH 4785/5725] drm/amd/display: fix potential infinite loop in fbc
path
- 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>
---
drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
index df02701..1f7f250 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c
@@ -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 {
--
2.7.4
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