From f5cc09acece432d536c2e62c791b52760a25fa5c Mon Sep 17 00:00:00 2001
From: Eric Huang <JinhuiEric.Huang@amd.com>
Date: Fri, 9 Jul 2021 14:51:34 -0400
Subject: [PATCH] Revert "drm/amdkfd: Add memory sync before TLB flush on
unmap"
This reverts commit 3be4dca197010d1328df8b11febc8c40491be498.
Reason for revert: it causes regressions on several Asics.
Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 23 +++--------------------
1 file changed, 3 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 67541c30327a6..a10e3823b6604 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1566,29 +1566,13 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
i, args->n_devices);
goto unmap_memory_from_gpu_failed;
}
- args->n_success = i+1;
- }
- mutex_unlock(&p->mutex);
-
- err = amdgpu_amdkfd_gpuvm_sync_memory(dev->kgd, (struct kgd_mem *) mem, true);
- if (err) {
- pr_debug("Sync memory failed, wait interrupted by user signal\n");
- goto sync_memory_failed;
- }
-
- /* Flush TLBs after waiting for the page table updates to complete */
- for (i = 0; i < args->n_devices; i++) {
- peer = kfd_device_by_id(devices_arr[i]);
- if (WARN_ON_ONCE(!peer))
- continue;
- peer_pdd = kfd_get_process_device_data(peer, p);
- if (WARN_ON_ONCE(!peer_pdd))
- continue;
kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
+ args->n_success = i+1;
}
-
kfree(devices_arr);
+ mutex_unlock(&p->mutex);
+
return 0;
bind_process_to_device_failed:
@@ -1596,7 +1580,6 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
unmap_memory_from_gpu_failed:
mutex_unlock(&p->mutex);
copy_from_user_failed:
-sync_memory_failed:
kfree(devices_arr);
return err;
}
--
GitLab