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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-11-27 14:15:58 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-11-29 12:20:44 +0100 |
| commit | 76f92201b821dd2f442ebe37ec9b52b525855bac (patch) | |
| tree | 156abcd154eb74b08493323ecfdeca50b40daa76 /drivers/video/fbdev/vfb.c | |
| parent | 23dad7b95fea68426311405a0627b90c06c3fc34 (diff) | |
| download | linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.tar.gz linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.tar.bz2 linux-stable-76f92201b821dd2f442ebe37ec9b52b525855bac.zip | |
fbdev: Push pgprot_decrypted() into mmap implementations
If a driver sets struct fb_ops.fb_mmap, the fbdev core automatically
calls pgprot_decrypted(). But the default fb_mmap code doesn't handle
pgprot_decrypted().
Move the call to pgprot_decrypted() into each drivers' fb_mmap function.
This only concerns fb_mmap functions for system and DMA memory. For
I/O memory, which is the default case, nothing changes. The fb_mmap
for I/O-memory can later be moved into a helper as well.
DRM's fbdev emulation handles pgprot_decrypted() internally via the
Prime helpers. Fbdev doesn't have to do anything in this case. In
cases where DRM uses deferred I/O, this patch updates fb_mmap correctly.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231127131655.4020-30-tzimmermann@suse.de
Diffstat (limited to 'drivers/video/fbdev/vfb.c')
| -rw-r--r-- | drivers/video/fbdev/vfb.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/video/fbdev/vfb.c b/drivers/video/fbdev/vfb.c index f6140f247e4b..f86149ba3835 100644 --- a/drivers/video/fbdev/vfb.c +++ b/drivers/video/fbdev/vfb.c @@ -382,6 +382,8 @@ static int vfb_pan_display(struct fb_var_screeninfo *var, static int vfb_mmap(struct fb_info *info, struct vm_area_struct *vma) { + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); + return remap_vmalloc_range(vma, (void *)info->fix.smem_start, vma->vm_pgoff); } |