Patch "drm/amdgpu: don't try to recreate sysfs entries on resume" has been added to the 4.2-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu: don't try to recreate sysfs entries on resume

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-don-t-try-to-recreate-sysfs-entries-on-resume.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c86f5ebfbd147d1a228ab89ee1658e18939bd7ad Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 23 Oct 2015 10:45:14 -0400
Subject: drm/amdgpu: don't try to recreate sysfs entries on resume

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

commit c86f5ebfbd147d1a228ab89ee1658e18939bd7ad upstream.

Fixes an error on resume caused by:
fa022a9b65d2886486a022fd66b20c823cd76ad9

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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;
 }
 


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.2/drm-radeon-move-bl-encoder-assignment-into-bl-init.patch
queue-4.2/drm-amdgpu-add-missing-dpm-check-for-kv-dpm-late-init.patch
queue-4.2/drm-radeon-fix-dpms-when-driver-backlight-control-is-disabled.patch
queue-4.2/drm-amdgpu-don-t-try-to-recreate-sysfs-entries-on-resume.patch
queue-4.2/drm-radeon-don-t-try-to-recreate-sysfs-entries-on-resume.patch
queue-4.2/drm-radeon-dpm-don-t-add-pwm-attributes-if-dpm-is-disabled.patch