diff options
| author | Souptick Joarder <jrdr.linux@gmail.com> | 2018-04-25 10:29:22 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-05-23 10:48:46 +0200 |
| commit | 3c5f134ac9d0e405a15af652c3ce8cbaa9bf1bc7 (patch) | |
| tree | d46c37f8c4b6dfc49caefc5740174e7c240857c1 /drivers/gpu/drm/udl | |
| parent | ca510ead96d78c5379db5d36ffbdf5382f36db6d (diff) | |
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
Diffstat (limited to 'drivers/gpu/drm/udl')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_drv.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/udl/udl_gem.c | 15 |
2 files changed, 4 insertions, 14 deletions
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) |