From 3c5f134ac9d0e405a15af652c3ce8cbaa9bf1bc7 Mon Sep 17 00:00:00 2001
From: Souptick Joarder <jrdr.linux@gmail.com>
Date: Wed, 25 Apr 2018 10:29:22 +0530
Subject: gpu: drm: udl: Adding new typedef vm_fault_t
Use new return type vm_fault_t for fault and huge_fault
handler. For now, this is just documenting that the
function returns a VM_FAULT value rather than an errno.
Once all instances are converted, vm_fault_t will become
a distinct type.
Commit 1c8f422059ae ("mm: change return type to vm_fault_t")
Previously vm_insert_page() returns err which driver
mapped into VM_FAULT_* type. The new function vmf_
insert_page() will replace this inefficiency by
returning VM_FAULT_* type.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180425045922.GA21590@jordon-HP-15-Notebook-PC
---
drivers/gpu/drm/udl/udl_drv.h | 3 ++-
drivers/gpu/drm/udl/udl_gem.c | 15 ++-------------
2 files changed, 4 insertions(+), 14 deletions(-)
(limited to 'drivers/gpu/drm/udl')
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index 55c0cc309198..072582570a4f 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -16,6 +16,7 @@
#include <linux/usb.h>
#include <drm/drm_gem.h>
+#include <linux/mm_types.h>
#define DRIVER_NAME "udl"
#define DRIVER_DESC "DisplayLink"
@@ -136,7 +137,7 @@ void udl_gem_put_pages(struct udl_gem_object *obj);
int udl_gem_vmap(struct udl_gem_object *obj);
void udl_gem_vunmap(struct udl_gem_object *obj);
int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-int udl_gem_fault(struct vm_fault *vmf);
+vm_fault_t udl_gem_fault(struct vm_fault *vmf);
int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
int width, int height);
diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 9a15cce22cce..d5a23295dd80 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -100,13 +100,12 @@ int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
return ret;
}
-int udl_gem_fault(struct vm_fault *vmf)
+vm_fault_t udl_gem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct udl_gem_object *obj = to_udl_bo(vma->vm_private_data);
struct page *page;
unsigned int page_offset;
- int ret = 0;
page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
@@ -114,17 +113,7 @@ int udl_gem_fault(struct vm_fault *vmf)
return VM_FAULT_SIGBUS;
page = obj->pages[page_offset];
- ret = vm_insert_page(vma, vmf->address, page);
- switch (ret) {
- case -EAGAIN:
- case 0:
- case -ERESTARTSYS:
- return VM_FAULT_NOPAGE;
- case -ENOMEM:
- return VM_FAULT_OOM;
- default:
- return VM_FAULT_SIGBUS;
- }
+ return vmf_insert_page(vma, vmf->address, page);
}
int udl_gem_get_pages(struct udl_gem_object *obj)
--
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