[PATCH] drm/amd/amdgpu: S3 resume fail

[jimqu]

Doing S3 stress test, sometimes, driver can not get console lock. So use
console_trylock() to instead it.

Change-Id: I50177f3d7dbb923cb4f602a11ea51c397b12b3e6
Signed-off-by: JimQu <Jim.Qu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 087e520..bd5387d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1889,9 +1889,6 @@ int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
 
-	if (fbcon) {
-		console_lock();
-	}
 	if (resume) {
 		pci_set_power_state(dev->pdev, PCI_D0);
 		pci_restore_state(dev->pdev);
@@ -1989,6 +1986,8 @@ int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 #endif
 
 	if (fbcon) {
+		if (!console_trylock())
+			return 0;
 		amdgpu_fbdev_set_suspend(adev, 0);
 		console_unlock();
 	}
-- 
1.9.1