The patch below does not apply to the 6.2-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.2.y git checkout FETCH_HEAD git cherry-pick -x 7ee938ac006096fe9c3f1075f56b9263587c150f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023051343-header-connected-1fbb@gregkh' --subject-prefix 'PATCH 6.2.y' HEAD^..

Possible dependencies:

7ee938ac0060 ("drm/amdgpu: Don't resume IOMMU after incomplete init")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 7ee938ac006096fe9c3f1075f56b9263587c150f Mon Sep 17 00:00:00 2001 From: Felix Kuehling Felix.Kuehling@amd.com Date: Mon, 13 Mar 2023 20:03:08 -0400 Subject: [PATCH] drm/amdgpu: Don't resume IOMMU after incomplete init

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

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index 3de7f616a001..ec70a1658dc3 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) @@ -624,7 +625,7 @@ 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)) @@ -772,6 +773,14 @@ 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;