[PATCH] drm/amdgpu: Initialize variable before use

["Siqueira, Rodrigo" <Rodrigo.Siqueira@amd.com>]

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The 'debug_data' variable gets printed in debug statements without a
prior initialization in the function
hubbub1_verify_allow_pstate_change_high, as reported when building with
gcc 9.1.0:

warning: ‘debug_data’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  290 |  printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
      |  ^~~~~~
dc/dcn10/dcn10_hubbub.c:134:15: note: ‘debug_data’ was declared here
  134 |  unsigned int debug_data;

Note that initialize debug_data with 0, in this case, is safe because we
have a loop in a few lines below that will initialize this variable with
the proper value.

Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
index a780057e2dbc..b6967a7e6c7b 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c
@@ -133,7 +133,7 @@ bool hubbub1_verify_allow_pstate_change_high(
 	static unsigned int max_sampled_pstate_wait_us; /* data collection */
 	static bool forced_pstate_allow; /* help with revert wa */
 
-	unsigned int debug_data;
+	unsigned int debug_data = 0;
 	unsigned int i;
 
 	if (forced_pstate_allow) {
-- 
2.23.0

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