[PATCH] drm/amd/amdgpu: fix Tonga S3 resume hang on rhel6.8

[Zhang, Jerry (Junwei)]

On 03/28/2017 05:27 PM, Jim Qu wrote:
> 1. security firmware loading has moved to sw init, so this code
>     is useless.
> 2. it seems that driver could not call request_firmware on
>     kernel 2.6, when S3 resume. for request firmware depends on
>     userspace, at this time, userspace is freeze.

Just confirm this fix will still work well on other OS?

Jerry
>
> Change-Id: I13977c60314ffe976924b1fdad1ab10df5d93c82
> Signed-off-by: Jim Qu <Jim.Qu at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 3 ---
>   1 file changed, 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> index d6cbdbe..a1a2d44 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
> @@ -840,9 +840,6 @@ static int amdgpu_cgs_get_firmware_info(struct cgs_device *cgs_device,
>   		const struct common_firmware_header *header;
>   		struct amdgpu_firmware_info *ucode = NULL;
>
> -		if (CGS_UCODE_ID_SMU_SK == type)
> -			amdgpu_cgs_rel_firmware(cgs_device, CGS_UCODE_ID_SMU);
> -
>   		if (!adev->pm.fw) {
>   			switch (adev->asic_type) {
>   			case CHIP_TOPAZ:
>