@@ -28,6 +28,7 @@
#include <linux/list.h>
#include <linux/types.h>
#include <linux/sizes.h>
+#include <linux/mm_types.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -62,7 +63,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
struct drm_file *file);
int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-int etnaviv_gem_fault(struct vm_fault *vmf);
+vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf);
int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj);
@@ -180,31 +180,30 @@ int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma)
return obj->ops->mmap(obj, vma);
}
-int etnaviv_gem_fault(struct vm_fault *vmf)
+vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct drm_gem_object *obj = vma->vm_private_data;
struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
struct page **pages, *page;
pgoff_t pgoff;
- int ret;
+ int err;
/*
* Make sure we don't parallel update on a fault, nor move or remove
- * something from beneath our feet. Note that vm_insert_page() is
+ * something from beneath our feet. Note that vmf_insert_page() is
* specifically coded to take care of this, so we don't have to.
*/
- ret = mutex_lock_interruptible(&etnaviv_obj->lock);
- if (ret)
- goto out;
-
+ err = mutex_lock_interruptible(&etnaviv_obj->lock);
+ if (err)
+ return VM_FAULT_NOPAGE;
/* make sure we have pages attached now */
pages = etnaviv_gem_get_pages(etnaviv_obj);
mutex_unlock(&etnaviv_obj->lock);
if (IS_ERR(pages)) {
- ret = PTR_ERR(pages);
- goto out;
+ err = PTR_ERR(pages);
+ return vmf_error(err);
}
/* We don't use vmf->pgoff since that has the fake offset: */
@@ -215,25 +214,7 @@ int etnaviv_gem_fault(struct vm_fault *vmf)
VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
- ret = vm_insert_page(vma, vmf->address, page);
-
-out:
- 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_page(vma, vmf->address, page);
}
int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)
Use new return type vm_fault_t for 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. Ref-> 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. vmf_error() is the newly introduce inline function in 4.17-rc6. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> --- v2: mutex_lock_killable() is replaced with previous mutex_lock_interruptible() cause that discussion is not yet reached to any conclusion. v3: updated the change log. drivers/gpu/drm/etnaviv/etnaviv_drv.h | 3 ++- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 37 +++++++++-------------------------- 2 files changed, 11 insertions(+), 29 deletions(-)