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drm/v3d: use new return type vm_fault_t in v3d_gem_fault

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Instead of converting an errno into a vm_fault_t ourselves, use
vmf_insert_mixed() which returns a vm_fault_t directly.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180704145556.GA11036@jordon-HP-15-Notebook-PC
Reviewed-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Souptick Joarder 2018-07-04 20:25:57 +05:30 committed by Eric Anholt
parent 0b7510d15e
commit 408633d2e7
2 changed files with 6 additions and 23 deletions
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26
drivers/gpu/drm/v3d/v3d_bo.c
View File

@ -227,37 +227,19 @@ v3d_set_mmap_vma_flags(struct vm_area_struct *vma)
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
}
int v3d_gem_fault(struct vm_fault *vmf)
vm_fault_t v3d_gem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct drm_gem_object *obj = vma->vm_private_data;
struct v3d_bo *bo = to_v3d_bo(obj);
unsigned long pfn;
pfn_t pfn;
pgoff_t pgoff;
int ret;
/* We don't use vmf->pgoff since that has the fake offset: */
pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
pfn = page_to_pfn(bo->pages[pgoff]);
pfn = __pfn_to_pfn_t(page_to_pfn(bo->pages[pgoff]), PFN_DEV);
ret = vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV));
switch (ret) {
case -EAGAIN:
case 0:
case -ERESTARTSYS:
case -EINTR:
case -EBUSY:
/*
* EBUSY is ok: this just means that another thread
* already did the job.
*/
return VM_FAULT_NOPAGE;
case -ENOMEM:
return VM_FAULT_OOM;
default:
return VM_FAULT_SIGBUS;
}
return vmf_insert_mixed(vma, vmf->address, pfn);
}
int v3d_mmap(struct file *filp, struct vm_area_struct *vma)

3
drivers/gpu/drm/v3d/v3d_drv.h
View File

@ -2,6 +2,7 @@
/* Copyright (C) 2015-2018 Broadcom */
#include <linux/reservation.h>
#include <linux/mm_types.h>
#include <drm/drmP.h>
#include <drm/drm_encoder.h>
#include <drm/drm_gem.h>
@ -252,7 +253,7 @@ int v3d_mmap_bo_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int v3d_get_bo_offset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int v3d_gem_fault(struct vm_fault *vmf);
vm_fault_t v3d_gem_fault(struct vm_fault *vmf);
int v3d_mmap(struct file *filp, struct vm_area_struct *vma);
struct reservation_object *v3d_prime_res_obj(struct drm_gem_object *obj);
int v3d_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);