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From da7372c943bfab9ec3c56d402b78bd8a4b158ee0 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 21 Mar 2019 12:19:57 +0300
Subject: [PATCH 1672/2940] drm/amd/powerplay: Off by one in
vega20_get_smu_msg_index()
The > should be >= so that we don't read one element beyond the end of
the vega20_message_map[] array.
Fixes: 78031c2c4dcd ("drm/amd/powerplay: implement smu vega20_message_map for vega20")
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/powerplay/vega20_ppt.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
index 5297b23ebcd1..f5560c4243c2 100644
--- a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
@@ -132,7 +132,8 @@ static int vega20_message_map[SMU_MSG_MAX_COUNT] = {
static int vega20_get_smu_msg_index(struct smu_context *smc, uint32_t index)
{
int val;
- if (index > SMU_MSG_MAX_COUNT)
+
+ if (index >= SMU_MSG_MAX_COUNT)
return -EINVAL;
val = vega20_message_map[index];
--
2.17.1
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