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drm/amdgpu: avoid null pointer dereference

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null ptr should be checked first to avoid null ptr access

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guchun Chen 2019-09-17 17:49:29 +08:00 committed by Alex Deucher
parent f256ba473e
commit 8a3e801f19
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
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@ -1336,13 +1336,13 @@ static int amdgpu_ras_save_bad_pages(struct amdgpu_device *adev)
{
struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
struct ras_err_handler_data *data;
struct amdgpu_ras_eeprom_control *control =
&adev->psp.ras.ras->eeprom_control;
struct amdgpu_ras_eeprom_control *control;
int save_count;
if (!con || !con->eh_data)
return 0;
control = &con->eeprom_control;
data = con->eh_data;
save_count = data->count - control->num_recs;
/* only new entries are saved */