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drm/fb-helper: Unmap client buffer during shutdown 

The fbdev helper's generic probe function establishes a mapping for
framebuffers without shadow buffer. The clean-up function did not unmap
the buffer object. Add the unmap operation.

As fbdev devices are usally released during system shutdown, this has
not been a problem in practice.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201120102545.4047-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2020-11-20 11:25:37 +01:00
parent a102172c7f
commit 763aea17bf
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/drm_fb_helper.c
View File

@ -1988,14 +1988,19 @@ static void drm_fbdev_cleanup(struct drm_fb_helper *fb_helper)
if (!fb_helper->dev)
return;
if (fbi && fbi->fbdefio) {
fb_deferred_io_cleanup(fbi);
shadow = fbi->screen_buffer;
if (fbi) {
if (fbi->fbdefio)
fb_deferred_io_cleanup(fbi);
if (drm_fbdev_use_shadow_fb(fb_helper))
shadow = fbi->screen_buffer;
}
drm_fb_helper_fini(fb_helper);
vfree(shadow);
if (shadow)
vfree(shadow);
else
drm_client_buffer_vunmap(fb_helper->buffer);
drm_client_framebuffer_delete(fb_helper->buffer);
}