diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/5671-drm-amdkfd-Error-if-trying-to-acquire-VM-for-a-PDD-t.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/5671-drm-amdkfd-Error-if-trying-to-acquire-VM-for-a-PDD-t.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/5671-drm-amdkfd-Error-if-trying-to-acquire-VM-for-a-PDD-t.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/5671-drm-amdkfd-Error-if-trying-to-acquire-VM-for-a-PDD-t.patch new file mode 100644 index 00000000..e642e7d2 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/5671-drm-amdkfd-Error-if-trying-to-acquire-VM-for-a-PDD-t.patch @@ -0,0 +1,37 @@ +From ddaefc39a8a975b84b43dad9875fc7ce4ce3f208 Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Thu, 26 Apr 2018 15:22:46 -0400 +Subject: [PATCH 5671/5725] drm/amdkfd: Error if trying to acquire VM for a PDD + twice + +Return an error in kfd_process_device_init_vm is an attempt is made +to acquire a VM for a PDD that already has a VM. This could happen +if kfd_ioctl_acquire_vm is called multiple times for the same device +and process, or if it is called too late, after the process has +already been bound to the device by another ioctl. + +Returning an error here can help detect potential future problems in +user mode code instead of silently masking them. + +Change-Id: I55e46e2654e4d761ae4b43c194bd9a7f1dd3eefa +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +--- + drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c +index 182bf1c..3ecaad5 100644 +--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c ++++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c +@@ -719,7 +719,7 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd, + int ret; + + if (pdd->vm) +- return 0; ++ return drm_file ? -EBUSY : 0; + + p = pdd->process; + dev = pdd->dev; +-- +2.7.4 + |