Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
amdkfd: find kfd_process by filep->private_data in kfd_mmap
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>
authored by
Zhu Lingshan
and committed by
Alex Deucher
4eb38fc0
fac682a1
+7
-4
+7
-4
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+7
-4
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
···
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}
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-
static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
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+
static int kfd_mmap(struct file *filep, struct vm_area_struct *vma)
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{
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struct kfd_process *process;
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struct kfd_node *dev = NULL;
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unsigned long mmap_offset;
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unsigned int gpu_id;
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-
process = kfd_get_process(current);
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-
if (IS_ERR(process))
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-
return PTR_ERR(process);
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+
process = filep->private_data;
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+
if (!process)
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+
return -ESRCH;
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+
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+
if (process->lead_thread != current->group_leader)
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+
return -EBADF;
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mmap_offset = vma->vm_pgoff << PAGE_SHIFT;
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gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset);