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drm/amdgpu/swsmu/i2c: return an error if the SMU is not running

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Return an error if someone tries to use the i2c bus when the
SMU is not running.  Otherwise we can end up sending commands
to the SMU which will either get ignored or could cause other
issues depending on what state the GPU and SMU are in.

Cc: Luben.Tuikov@amd.com
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2022-01-27 12:17:23 -05:00
parent 3ed893396b
commit e281d5940a
4 changed files with 12 additions and 0 deletions
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3
drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
View file

@ -2071,6 +2071,9 @@ static int arcturus_i2c_xfer(struct i2c_adapter *i2c_adap,
int i, j, r, c;
u16 dir;
if (!adev->pm.dpm_enabled)
return -EBUSY;
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;

3
drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
View file

@ -2754,6 +2754,9 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap,
int i, j, r, c;
u16 dir;
if (!adev->pm.dpm_enabled)
return -EBUSY;
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;

3
drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
View file

@ -3449,6 +3449,9 @@ static int sienna_cichlid_i2c_xfer(struct i2c_adapter *i2c_adap,
int i, j, r, c;
u16 dir;
if (!adev->pm.dpm_enabled)
return -EBUSY;
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;

3
drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
View file

@ -1473,6 +1473,9 @@ static int aldebaran_i2c_xfer(struct i2c_adapter *i2c_adap,
int i, j, r, c;
u16 dir;
if (!adev->pm.dpm_enabled)
return -EBUSY;
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;