Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

amdgpu_cgs_acpi_eval_object() returned the value of variable "result"
without initializing it first.

This bug has been found by compiling the kernel with clang.  The
compiler complained:

    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:972:14: error: variable
    'result' is used uninitialized whenever 'for' loop exits because its
    condition is false [-Werror,-Wsometimes-uninitialized]
            for (i = 0; i < count; i++) {
                        ^~~~~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:1011:9: note: uninitialized
    use occurs here
            return result;
                   ^~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:972:14: note: remove the
    condition if it is always true
            for (i = 0; i < count; i++) {
                        ^~~~~~~~~
    drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c:864:12: note: initialize the
    variable 'result' to silence this warning
            int result;
                      ^
                       = 0

Fixes: 3f1d35a03b3c ("drm/amdgpu: implement new cgs interface for acpi
function")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

! has higher precedence than bitwise & so we need to add parenthesis
for this to work as intended.

Fixes: 048765ad5af7 ('amdgpu: fix asic initialization for virtualized environments (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

This was accidently broken for harvest cards when the
code was refactored for Polaris support.

v2: multiply by shader engines.  Noticed by Nicolai.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

There is no limit on high "idx" can go.  It should be less than
ARRAY_SIZE(data.states) which is 16.

The "data" variable wasn't declared in that scope so I shifted the code
around a bit to make it work.  Also I made "idx" unsigned.

Fixes: f3898ea12fc1 ('drm/amd/powerplay: add some sysfs interfaces for powerplay.')
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

This reverts commit 2ba272d7bde27e1db2cf1c6cee49b01b7ea08989.

The issue fixed by this patch is specific to compute rings and the
previous patch was enough.  Additionally, this patch as been traced
to strange behavior on some CZ systems so we might as well drop it.

Wrong operator.

Reported-by: David Binderman <linuxdev.baldrick@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

When executing in a PCI passthrough based virtuzliation environemnt, the
hypervisor will usually attempt to send a PCIe bus reset signal to the
ASIC when the VM reboots. In this scenario, the card is not correctly
initialized, but we still consider it to be posted. Therefore, in a
passthrough based environemnt we should always post the card to guarantee
it is in a good state for driver initialization.

However, if we are operating in SR-IOV mode it is up to the GIM driver
to manage the asic state, therefore we should not post the card (and
shouldn't be able to do it either).

v2: add missing semi-colon

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Andres Rodriguez <andres.rodriguez@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

This just fixes a warning when you disable powerplay.

Signed-off-by: Dave Airlie <airlied@redhat.com>

Powerplay uses cgs to load the firmware so add a function
to release it as well to avoid leaking it on driver unload.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>