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drm/amdgpu: fix dead lock if any ip block resume failed in s3 

Driver must free the console lock whether driver resuming successful
or not. Otherwise, fb_console will be always waiting for the lock and
then cause system stuck.

[  244.405541] INFO: task kworker/0:0:4 blocked for more than 120 seconds.
[  244.405543]       Tainted: G           OE   4.9.0-custom #1
[  244.405544] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  244.405541] INFO: task kworker/0:0:4 blocked for more than 120 seconds.
[  244.405543]       Tainted: G           OE   4.9.0-custom #1
[  244.405544] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  244.405550] kworker/0:0     D    0     4      2 0x00080000
[  244.405559] Workqueue: events console_callback
[  244.405564]  ffff88045a2cfc00 0000000000000000 ffff880462b75940 ffffffff81c0e500
[  244.405568]  ffff880476419280 ffffc900018f7c90 ffffffff817dcf62 000000000000003c
[  244.405572]  0000000100000000 0000000000000002 ffff880462b75940 ffff880462b75940
[  244.405573] Call Trace:
[  244.405580]  [<ffffffff817dcf62>] ? __schedule+0x222/0x6a0
[  244.405584]  [<ffffffff817dd416>] schedule+0x36/0x80
[  244.405588]  [<ffffffff817e041c>] schedule_timeout+0x1fc/0x390
[  244.405592]  [<ffffffff817df1b4>] __down_common+0xa5/0xf8
[  244.405598]  [<ffffffff810b2ca8>] ? put_prev_entity+0x48/0x710
[  244.405601]  [<ffffffff817df224>] __down+0x1d/0x1f
[  244.405606]  [<ffffffff810c71a1>] down+0x41/0x50
[  244.405611]  [<ffffffff810d380a>] console_lock+0x1a/0x40
[  244.405614]  [<ffffffff814e3c03>] console_callback+0x13/0x160
[  244.405617]  [<ffffffff817dcf6a>] ? __schedule+0x22a/0x6a0
[  244.405623]  [<ffffffff810954e3>] process_one_work+0x153/0x3f0
[  244.405628]  [<ffffffff81095cab>] worker_thread+0x12b/0x4b0
[  244.405633]  [<ffffffff81095b80>] ? rescuer_thread+0x350/0x350
[  244.405637]  [<ffffffff8109b473>] kthread+0xd3/0xf0
[  244.405641]  [<ffffffff8109b3a0>] ? kthread_park+0x60/0x60
[  244.405645]  [<ffffffff8109b3a0>] ? kthread_park+0x60/0x60
[  244.405649]  [<ffffffff817e1ee5>] ret_from_fork+0x25/0x30

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Huang Rui 2017-04-13 16:12:26 +08:00 committed by Alex Deucher
parent 8f12bbe6d9
commit 03161a6ecb
1 changed files with 12 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -2215,7 +2215,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
struct drm_connector *connector;
struct amdgpu_device *adev = dev->dev_private;
struct drm_crtc *crtc;
int r;
int r = 0;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
@ -2227,11 +2227,8 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
pci_set_power_state(dev->pdev, PCI_D0);
pci_restore_state(dev->pdev);
r = pci_enable_device(dev->pdev);
if (r) {
if (fbcon)
console_unlock();
return r;
}
if (r)
goto unlock;
}
if (adev->is_atom_fw)
amdgpu_atomfirmware_scratch_regs_restore(adev);
@ -2248,7 +2245,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
r = amdgpu_resume(adev);
if (r) {
DRM_ERROR("amdgpu_resume failed (%d).\n", r);
return r;
goto unlock;
}
amdgpu_fence_driver_resume(adev);
@ -2259,11 +2256,8 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
}
r = amdgpu_late_init(adev);
if (r) {
if (fbcon)
console_unlock();
return r;
}
if (r)
goto unlock;
/* pin cursors */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@ -2313,12 +2307,14 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
dev->dev->power.disable_depth--;
#endif
if (fbcon) {
if (fbcon)
amdgpu_fbdev_set_suspend(adev, 0);
console_unlock();
}
return 0;
unlock:
if (fbcon)
console_unlock();
return r;
}
static bool amdgpu_check_soft_reset(struct amdgpu_device *adev)