From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Tue, 14 Mar 2023 00:03:08 +0000 (-0400)
Subject: drm/amdgpu: Don't resume IOMMU after incomplete init
X-Git-Tag: baikal/mips/sdk6.1~44
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=68c808a3c5cf11cfb4bf49c2f947edabd3918881;p=kernel.git

drm/amdgpu: Don't resume IOMMU after incomplete init

commit b4ace06197b68ed82f630d78f4c4cc164e8b532f upstream.

Check kfd->init_complete in kgd2kfd_iommu_resume, consistent with other
kgd2kfd calls. This should fix IOMMU errors on resume from suspend when
KFD IOMMU initialization failed.

Reported-by: Matt Fagnani <matt.fagnani@bell.net>
Link: https://lore.kernel.org/r/4a3b225c-2ffd-e758-4de1-447375e34cad@bell.net/
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217170
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2454
Cc: Vasant Hegde <vasant.hegde@amd.com>
Cc: Linux regression tracking (Thorsten Leemhuis) <regressions@leemhuis.info>
Cc: stable@vger.kernel.org
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Matt Fagnani <matt.fagnani@bell.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 65a1d4f9004ba..a75e1af77365d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -59,6 +59,7 @@ static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
 				unsigned int chunk_size);
 static void kfd_gtt_sa_fini(struct kfd_dev *kfd);
 
+static int kfd_resume_iommu(struct kfd_dev *kfd);
 static int kfd_resume(struct kfd_dev *kfd);
 
 static void kfd_device_info_set_sdma_info(struct kfd_dev *kfd)
@@ -634,7 +635,7 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
 
 	svm_migrate_init(kfd->adev);
 
-	if (kgd2kfd_resume_iommu(kfd))
+	if (kfd_resume_iommu(kfd))
 		goto device_iommu_error;
 
 	if (kfd_resume(kfd))
@@ -782,6 +783,14 @@ int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm)
 }
 
 int kgd2kfd_resume_iommu(struct kfd_dev *kfd)
+{
+	if (!kfd->init_complete)
+		return 0;
+
+	return kfd_resume_iommu(kfd);
+}
+
+static int kfd_resume_iommu(struct kfd_dev *kfd)
 {
 	int err = 0;