Unverified Commit f9f2b4a0 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!7396 drm/amdgpu: Fix cat debugfs amdgpu_regs_didt causes kernel null pointer 

Merge Pull Request from: @ci-robot 
 
PR sync from: Baogen Shang <baogen.shang@outlook.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/T533YR2FD3W6QAOXM5S3FOKYNVXRYN7F/ 
 
https://gitee.com/openeuler/kernel/issues/I9J6AL 
 
Link:https://gitee.com/openeuler/kernel/pulls/7396

 

Reviewed-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 9dccc6d1 e7adfbdc

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

+6 −0
Original line number Diff line number Diff line
@@ -459,6 +459,9 @@ static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf, 
	if (size & 0x3 || *pos & 0x3)

		return -EINVAL;



	if (!adev->didt_rreg)

		return -EOPNOTSUPP;



	r = pm_runtime_get_sync(adev_to_drm(adev)->dev);

	if (r < 0) {

		pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
@@ -518,6 +521,9 @@ static ssize_t amdgpu_debugfs_regs_didt_write(struct file *f, const char __user 
	if (size & 0x3 || *pos & 0x3)

		return -EINVAL;



	if (!adev->didt_wreg)

		return -EOPNOTSUPP;



	r = pm_runtime_get_sync(adev_to_drm(adev)->dev);

	if (r < 0) {

		pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);