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amdkfd: find kfd_process by filep->private_data in kfd_mmap

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This commit finds the proper kfd_process by
filep->private_data in kfd_mmap,
because the function kfd_get_process()
can not locate a specific kfd process among
multiple contexts.

Signed-off-by: Zhu Lingshan <lingshan.zhu@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zhu Lingshan
2025-08-04 15:33:51 +08:00
committed by Alex Deucher
parent fac682a1d1
commit 4eb38fc0f1
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@@ -3414,16 +3414,19 @@ static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process,
}
static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
static int kfd_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct kfd_process *process;
struct kfd_node *dev = NULL;
unsigned long mmap_offset;
unsigned int gpu_id;
process = kfd_get_process(current);
if (IS_ERR(process))
return PTR_ERR(process);
process = filep->private_data;
if (!process)
return -ESRCH;
if (process->lead_thread != current->group_leader)
return -EBADF;
mmap_offset = vma->vm_pgoff << PAGE_SHIFT;
gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset);