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: 3f1d35a03b ("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: 048765ad5a ('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: f3898ea12f ('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 2ba272d7bd.
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.
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>
* tag 'drm-amdkfd-fixes-2016-06-03' of git://people.freedesktop.org/~gabbayo/linux:
drm/amdkfd: print once about mem_banks truncation
drm/amdkfd: destroy dbgmgr in notifier release
drm/amdkfd: unbind only existing processes
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>
Since vmid-mgr supports vmid sharing in one vm, the same ctx could
get different vmids for two emits without vm flush, vm_flush could
be done in another ring.
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
should fist halt engine, and then doing the register
programing, and later unhalt engine, and finally run
ring_test.
this help fix reloading driver hang issue of SDMA
ring
original sequence is wrong for it programing engine
after unhalt, which will lead to fault behavior when
doing driver reloading after unloaded.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1,should use late_fini to kfree all resource otherwise
the released pointer maybe accessed in IRQ ip fini routine.
2,hwmgr should not be kfree by pem_fini which is invoked
by hw fini path.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
