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From cf2ec759c2eb91c144c94a1eed145982c01f31e3 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 7 Oct 2019 12:02:06 +0300
Subject: [PATCH 3993/4256] drm/amd/powerplay: Fix error handling in
smu_init_fb_allocations()
The error handling is off by one. We should not free the first
"tables[i].bo" without decrementing "i" because that might result in a
double free. The second problem is that when an error occurs, then the
zeroth element "tables[0].bo" isn't freed.
I had make "i" signed int for the error handling to work, so I just
updated "ret" as well as a clean up.
Fixes: f96357a991b9 ("drm/amd/powerplay: implement smu_init(fini)_fb_allocations function")
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/amdgpu_smu.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 88d7376aee71..054376342454 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -896,8 +896,7 @@ static int smu_init_fb_allocations(struct smu_context *smu)
struct amdgpu_device *adev = smu->adev;
struct smu_table_context *smu_table = &smu->smu_table;
struct smu_table *tables = smu_table->tables;
- uint32_t i = 0;
- int32_t ret = 0;
+ int ret, i;
for (i = 0; i < SMU_TABLE_COUNT; i++) {
if (tables[i].size == 0)
@@ -915,7 +914,7 @@ static int smu_init_fb_allocations(struct smu_context *smu)
return 0;
failed:
- for (; i > 0; i--) {
+ while (--i >= 0) {
if (tables[i].size == 0)
continue;
amdgpu_bo_free_kernel(&tables[i].bo,
--
2.17.1
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