From: Souptick Joarder Date: Sun, 26 May 2019 16:10:27 +0000 (+0530) Subject: auxdisplay/cfag12864bfb.c: Convert to use vm_map_pages_zero() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=461e274b2821901ca9c084f43074ad099848199f;p=openwrt%2Fstaging%2Fblogic.git auxdisplay/cfag12864bfb.c: Convert to use vm_map_pages_zero() While using mmap, the incorrect values of length and vm_pgoff are ignored and this driver goes ahead with mapping cfag12864b_buffer to user vma. Convert vm_insert_pages() to use vm_map_pages_zero(). We could later "fix" these drivers to behave according to the normal vm_pgoff offsetting simply by removing the _zero suffix on the function name and if that causes regressions, it gives us an easy way to revert. Signed-off-by: Souptick Joarder Signed-off-by: Miguel Ojeda --- diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c index 40c8a552a478..4074886b7bc8 100644 --- a/drivers/auxdisplay/cfag12864bfb.c +++ b/drivers/auxdisplay/cfag12864bfb.c @@ -52,8 +52,9 @@ static const struct fb_var_screeninfo cfag12864bfb_var = { static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma) { - return vm_insert_page(vma, vma->vm_start, - virt_to_page(cfag12864b_buffer)); + struct page *pages = virt_to_page(cfag12864b_buffer); + + return vm_map_pages_zero(vma, &pages, 1); } static struct fb_ops cfag12864bfb_ops = {