Interpret (otherwise-invalid) NULL apertures argument to mean all-memory range. This will allow to remove several duplicates of this code from drivers in following patches.
Signed-off-by: Michał Mirosław mirq-linux@rere.qmqm.pl [for v1] Acked-by: Bartlomiej Zolnierkiewicz b.zolnierkie@samsung.com
--- v2: added kerneldoc to corresponding DRM helper --- drivers/video/fbdev/core/fbmem.c | 14 ++++++++++++++ include/drm/drm_fb_helper.h | 10 ++++++++++ 2 files changed, 24 insertions(+)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c index 30a18d4c9de4..0df148eb4699 100644 --- a/drivers/video/fbdev/core/fbmem.c +++ b/drivers/video/fbdev/core/fbmem.c @@ -1779,11 +1779,25 @@ int remove_conflicting_framebuffers(struct apertures_struct *a, const char *name, bool primary) { int ret; + bool do_free = false; + + if (!a) { + a = alloc_apertures(1); + if (!a) + return -ENOMEM; + + a->ranges[0].base = 0; + a->ranges[0].size = ~0; + do_free = true; + }
mutex_lock(®istration_lock); ret = do_remove_conflicting_framebuffers(a, name, primary); mutex_unlock(®istration_lock);
+ if (do_free) + kfree(a); + return ret; } EXPORT_SYMBOL(remove_conflicting_framebuffers); diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index b069433e7fc1..1c1e53abb25d 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -566,6 +566,16 @@ static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
#endif
+/** + * drm_fb_helper_remove_conflicting_framebuffers - remove firmware framebuffers + * @a: memory range, users of which are to be removed + * @name: requesting driver name + * @primary: also kick vga16fb if present + * + * This function removes framebuffer devices (eg. initialized by firmware) + * which use memory range described by @a. If @a is NULL all such devices are + * removed. + */ static inline int drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a, const char *name, bool primary)