linux-kernel - [PATCH 4.2 044/110] drm/amdgpu: dont try to recreate sysfs entries on resume

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Message-Id: <20151106191705.562477772@linuxfoundation.org>
Date:	Fri,  6 Nov 2015 11:18:51 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.2 044/110] drm/amdgpu: dont try to recreate sysfs entries on resume

4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@....com>

commit c86f5ebfbd147d1a228ab89ee1658e18939bd7ad upstream.

Fixes an error on resume caused by:
fa022a9b65d2886486a022fd66b20c823cd76ad9

Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h    |    1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c |    5 +++++
 2 files changed, 6 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1583,6 +1583,7 @@ struct amdgpu_pm {
 	u8                      fan_max_rpm;
 	/* dpm */
 	bool                    dpm_enabled;
+	bool                    sysfs_initialized;
 	struct amdgpu_dpm       dpm;
 	const struct firmware	*fw;	/* SMC firmware */
 	uint32_t                fw_version;
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -693,6 +693,9 @@ int amdgpu_pm_sysfs_init(struct amdgpu_d
 {
 	int ret;
 
+	if (adev->pm.sysfs_initialized)
+		return 0;
+
 	if (adev->pm.funcs->get_temperature == NULL)
 		return 0;
 	adev->pm.int_hwmon_dev = hwmon_device_register_with_groups(adev->dev,
@@ -721,6 +724,8 @@ int amdgpu_pm_sysfs_init(struct amdgpu_d
 		return ret;
 	}
 
+	adev->pm.sysfs_initialized = true;
+
 	return 0;
 }
 


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