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drm/fb-helper: Fix the dummy remove_conflicting_framebuffers 

We always need to remove conflicting framebuffers if any other fb driver
is enabled, and not just if we are setting up an fbdev ourselves.

Unfortunately remove_conflicting_framebuffers() was incorrectly stubbed
out if !fbdev rather than !fb leading to major memory corruption (and
corrupt filesystems) upon boot.

Fixes: 44adece57e ("drm/fb-helper: Add a dummy remove_conflicting_framebuffers")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: tomi.valkeinen@ti.com
Cc: dh.herrmann@gmail.com
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160822204452.2509-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-08-22 21:44:52 +01:00 committed by Daniel Vetter
parent d1c151dcae
commit 0a3bfe29f8
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/drm/drm_fb_helper.h
View File

@ -282,12 +282,6 @@ drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
struct drm_connector *connector);
static inline int
drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
const char *name, bool primary)
{
return remove_conflicting_framebuffers(a, name, primary);
}
#else
static inline int drm_fb_helper_modinit(void)
{
@ -482,11 +476,17 @@ drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
return 0;
}
#endif
static inline int
drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
const char *name, bool primary)
{
#if IS_ENABLED(CONFIG_FB)
return remove_conflicting_framebuffers(a, name, primary);
#else
return 0;
#endif
}
#endif
#endif