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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1144-drm-amd-display-Fix-use-of-uninitialized-union.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1144-drm-amd-display-Fix-use-of-uninitialized-union.patch36
1 files changed, 36 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1144-drm-amd-display-Fix-use-of-uninitialized-union.patch b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1144-drm-amd-display-Fix-use-of-uninitialized-union.patch
new file mode 100644
index 00000000..b4689038
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1144-drm-amd-display-Fix-use-of-uninitialized-union.patch
@@ -0,0 +1,36 @@
+From d0bff6a4d45161fc76ec2ef0354a8c4e46125e01 Mon Sep 17 00:00:00 2001
+From: John Barberiz <John.Barberiz@amd.com>
+Date: Tue, 8 Jan 2019 17:43:08 -0500
+Subject: [PATCH 1144/2940] drm/amd/display: Fix use of uninitialized union
+
+[Why]
+An uninitialized variable would randomly initialize to a large
+value. This caused enough delay to fail DP Compliance Test 400.2.1.
+
+[How]
+Initialize the variable.
+
+Signed-off-by: John Barberiz <John.Barberiz@amd.com>
+Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
+Acked-by: Leo Li <sunpeng.li@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+index 431805c566cf..92f565ca1260 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+@@ -47,7 +47,7 @@ static void wait_for_training_aux_rd_interval(
+ struct dc_link *link,
+ uint32_t default_wait_in_micro_secs)
+ {
+- union training_aux_rd_interval training_rd_interval;
++ union training_aux_rd_interval training_rd_interval = {0};
+
+ /* overwrite the delay if rev > 1.1*/
+ if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
+--
+2.17.1
+