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drm/amdgpu: avoid soft lockup when waiting for RLC serdes (v2)

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Normally all waiting get timeout if there's one.
Release the lock and return immediately when timeout happens.

v2:
 - set the se_sh to broadcase before return

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: pding <Pixel.Ding@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
pding 2017-10-23 16:31:04 +08:00 committed by Alex Deucher
parent 9953b72f9c
commit 1366b2d016
2 changed files with 16 additions and 0 deletions
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8
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
View file

@ -3851,6 +3851,14 @@ static void gfx_v8_0_wait_for_rlc_serdes(struct amdgpu_device *adev)
break;
udelay(1);
}
if (k == adev->usec_timeout) {
gfx_v8_0_select_se_sh(adev, 0xffffffff,
0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
DRM_INFO("Timeout wait for RLC serdes %u,%u\n",
i, j);
return;
}
}
}
gfx_v8_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);

8
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
View file

@ -1645,6 +1645,14 @@ static void gfx_v9_0_wait_for_rlc_serdes(struct amdgpu_device *adev)
break;
udelay(1);
}
if (k == adev->usec_timeout) {
gfx_v9_0_select_se_sh(adev, 0xffffffff,
0xffffffff, 0xffffffff);
mutex_unlock(&adev->grbm_idx_mutex);
DRM_INFO("Timeout wait for RLC serdes %u,%u\n",
i, j);
return;
}
}
}
gfx_v9_0_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff);