[AMD Public Use]
Sorry, I read this yesterday and forgot to reply.
Reviewed-by: Kent Russell <kent.russell@xxxxxxx>
> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Felix Kuehling
> Sent: Thursday, September 17, 2020 12:16 AM
> To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Subject: [PATCH 1/1] drm/amdgpu: Fix handling of KFD initialization failures
>
> Remember KFD module initializaton status in a global variable. Skip KFD
> device probing when the module was not initialized. Other amdgpu_amdkfd
> calls are then protected by the adev->kfd.dev check.
>
> Also print a clear error message when KFD disables itself. Amdgpu
> continues its intialization even when KFD failed.
>
> Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 11 ++++++++++-
> drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 1 +
> drivers/gpu/drm/amd/amdkfd/kfd_module.c | 1 +
> 3 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> index d58148f455dd..7f14461f7f40 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
> @@ -36,6 +36,8 @@
> */
> uint64_t amdgpu_amdkfd_total_mem_size;
>
> +bool kfd_initialized;
> +
> int amdgpu_amdkfd_init(void)
> {
> struct sysinfo si;
> @@ -51,19 +53,26 @@ int amdgpu_amdkfd_init(void)
> #else
> ret = -ENOENT;
> #endif
> + kfd_initialized = !ret;
>
> return ret;
> }
>
> void amdgpu_amdkfd_fini(void)
> {
> - kgd2kfd_exit();
> + if (kfd_initialized) {
> + kgd2kfd_exit();
> + kfd_initialized = false;
> + }
> }
>
> void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev)
> {
> bool vf = amdgpu_sriov_vf(adev);
>
> + if (!kfd_initialized)
> + return;
> +
> adev->kfd.dev = kgd2kfd_probe((struct kgd_dev *)adev,
> adev->pdev, adev->asic_type, vf);
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> index b7b16adb0615..297484ca7d19 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> @@ -97,6 +97,7 @@ void kfd_chardev_exit(void)
> device_destroy(kfd_class, MKDEV(kfd_char_dev_major, 0));
> class_destroy(kfd_class);
> unregister_chrdev(kfd_char_dev_major, kfd_dev_name);
> + kfd_device = NULL;
> }
>
> struct device *kfd_chardev(void)
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> index f4b7f7e6c40e..e5aa51f44dd5 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> @@ -70,6 +70,7 @@ static int kfd_init(void)
> err_topology:
> kfd_chardev_exit();
> err_ioctl:
> + pr_err("KFD is disabled due to module intialization failure\n");
> return err;
> }
>
> --
> 2.17.1
>
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