[PATCH] drm/amdgpu: skip disabling audio when device is unplugged

[oushixiong1025 at 163.com]

From: Shixiong Ou <oushixiong at kylinos.cn>

When Stopping lightdm and removing amdgpu driver are executed, the following
error is triggered probably:

Unable to handle kernel paging request at virtual address 0000000000005e00
.....
[ 2] [T10084] Call trace:
[ 2] [T10084]  amdgpu_device_wreg.part.0+0x58/0x110 [amdgpu]
[ 2] [T10084]  amdgpu_device_wreg+0x20/0x38 [amdgpu]
[ 2] [T10084]  dce_v6_0_audio_endpt_wreg+0x64/0xd8 [amdgpu]
[ 2] [T10084]  dce_v6_0_sw_fini+0xa0/0x118 [amdgpu]
[ 2] [T10084]  amdgpu_device_ip_fini.isra.0+0xdc/0x1e8 [amdgpu]
[ 2] [T10084]  amdgpu_device_fini_sw+0x2c/0x220 [amdgpu]
[ 2] [T10084]  amdgpu_driver_release_kms+0x20/0x40 [amdgpu]
[ 2] [T10084]  devm_drm_dev_init_release+0x8c/0xc0 [drm]
[ 2] [T10084]  devm_action_release+0x18/0x28
[ 2] [T10084]  release_nodes+0x5c/0xc8
[ 2] [T10084]  devres_release_all+0xa0/0x130
[ 2] [T10084]  device_unbind_cleanup+0x1c/0x70
[ 2] [T10084]  device_release_driver_internal+0x1e4/0x228
[ 2] [T10084]  driver_detach+0x90/0x100
[ 2] [T10084]  bus_remove_driver+0x74/0x100
[ 2] [T10084]  driver_unregister+0x34/0x68
[ 2] [T10084]  pci_unregister_driver+0x24/0x108
[ 2] [T10084]  amdgpu_exit+0x1c/0x3270 [amdgpu]
[ 2] [T10084]  __do_sys_delete_module.constprop.0+0x1d0/0x330
[ 2] [T10084]  __arm64_sys_delete_module+0x18/0x28
[ 2] [T10084]  invoke_syscall+0x4c/0x120
[ 2] [T10084]  el0_svc_common.constprop.0+0xc4/0xf0
[ 2] [T10084]  do_el0_svc+0x24/0x38
[ 2] [T10084]  el0_svc+0x24/0x88
[ 2] [T10084]  el0t_64_sync_handler+0x134/0x150
[ 2] [T10084]  el0t_64_sync+0x14c/0x150
[ 2] [T10084] Code: f9401bf7 f9453e60 8b150000 d50332bf (b9000016)
[ 2] [T10084] ---[ end trace 0000000000000000 ]---

The adev->rmmio has been unmmaped in amdgpu_device_fini_hw().

So skip disabling audio when device is unplugged.

Signed-off-by: Shixiong Ou <oushixiong at kylinos.cn>
---
 drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index 276c025c4c03..48b29990da7f 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -23,6 +23,7 @@
 
 #include <linux/pci.h>
 
+#include <drm/drm_drv.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_modeset_helper.h>
@@ -1459,8 +1460,10 @@ static void dce_v6_0_audio_fini(struct amdgpu_device *adev)
 	if (!adev->mode_info.audio.enabled)
 		return;
 
-	for (i = 0; i < adev->mode_info.audio.num_pins; i++)
-		dce_v6_0_audio_enable(adev, &adev->mode_info.audio.pin[i], false);
+	if (!drm_dev_is_unplugged(adev_to_drm(adev))) {
+		for (i = 0; i < adev->mode_info.audio.num_pins; i++)
+			dce_v6_0_audio_enable(adev, &adev->mode_info.audio.pin[i], false);
+	}
 
 	adev->mode_info.audio.enabled = false;
 }
-- 
2.25.1