diff options
Diffstat (limited to 'drivers/video/fbdev/core/fbmem.c')
| -rw-r--r-- | drivers/video/fbdev/core/fbmem.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 84427470367b..b445a7a00def 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -1334,7 +1334,6 @@ static int fb_mmap(struct file *file, struct vm_area_struct * vma) { struct fb_info *info = file_fb_info(file); - int (*fb_mmap_fn)(struct fb_info *info, struct vm_area_struct *vma); unsigned long mmio_pgoff; unsigned long start; u32 len; @@ -1343,14 +1342,7 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) return -ENODEV; mutex_lock(&info->mm_lock); - fb_mmap_fn = info->fbops->fb_mmap; - -#if IS_ENABLED(CONFIG_FB_DEFERRED_IO) - if (info->fbdefio) - fb_mmap_fn = fb_deferred_io_mmap; -#endif - - if (fb_mmap_fn) { + if (info->fbops->fb_mmap) { int res; /* @@ -1358,9 +1350,19 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) * SME protection is removed ahead of the call */ vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); - res = fb_mmap_fn(info, vma); + res = info->fbops->fb_mmap(info, vma); mutex_unlock(&info->mm_lock); return res; +#if IS_ENABLED(CONFIG_FB_DEFERRED_IO) + } else if (info->fbdefio) { + /* + * FB deferred I/O wants you to handle mmap in your drivers. At a + * minimum, point struct fb_ops.fb_mmap to fb_deferred_io_mmap(). + */ + dev_warn_once(info->dev, "fbdev mmap not set up for deferred I/O.\n"); + mutex_unlock(&info->mm_lock); + return -ENODEV; +#endif } /* |