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  1. 03 5月, 2016 27 次提交
  3. 28 4月, 2016 5 次提交
  5. 27 4月, 2016 4 次提交
    • D
      drm: Switch blobs to the new generic modeset obj refcounting · 152ef5fa
      由 Daniel Vetter 提交于 
      Need to move the free function around a bit, but otherwise mostly
just removing code.

Specifically we can nuke all the _locked variants since the weak idr
reference is now protected by the idr_mutex, which we never hold
anywhere expect in the lookup/reg/unreg functions. And those never
call anything else.

Another benefit of this is that this patch switches the weak reference
logic from kref_put_mutex to kref_get_unless_zero. And the later is in
general more flexible wrt accomodating multiple weak references
protected by different locks, which might or might not come handy
eventually.

But one consequence of that switch is that we need to acquire the
blob_lock from the free function for the list_del calls. That's a bit
tricky to pull off, but works well if we pick the exact same scheme as
is already used for framebuffers. Most important changes:

- filp list is maintainer by create/destroy_blob ioctls directly
  (already the case, so we can just remove the redundant list_del from
  the free function).

- filp close handler walks the filp-private list lockless - works
  because we know no one else can access it. I copied the same comment
  from the fb code over to explain this.

- Otherwise we need to sufficiently restrict blob_lock critical
  sections to avoid all the unreference calls. Easy to do once the
  blob_lock only protects the list, and no longer the weak reference.

Cc: Dave Airlie <airlied@gmail.com>
Cc: Daniel Stone <daniels@collabora.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>
      152ef5fa
    • D
      drm/atomic-helpers: Don't duplicate code in destroy helpers · b0b5511b
      由 Daniel Vetter 提交于 
      Random drive-by refactoring I spotted.
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>
      b0b5511b
    • D
      drm: Fix fb leaks and WARN spew in get/set_prop ioctls · 1649c33b
      由 Daniel Vetter 提交于 
      Dave Airlie had at least the refcount leak fixed in a later patch (but
that patch does other things which need a bit more work). But we still
have the trouble that silly userspace could hit the WARN_ON in
drm_mode_object_find.

Fix this all up to make sure we don't leak objects, and don't spew
into demsg.

Fixes: d0f37cf6 ("drm/mode: move framebuffer reference into object.")
Testcase: igt/kms_addfb_basic/invalid-*-prop*
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>
      1649c33b
    • D
      drm: Improve kerneldoc for new mode object refcounting · 05981422
      由 Daniel Vetter 提交于 
      Slipped through the cracks in my review. The one issue I spotted
is that drm_mode_object_find now acquires references and can be
used on FB objects, which caused follow-on bugs in get/set_prop ioctls.
Follow-up patches will fix that.

[airlied: fixup some incr fb/decr object mixups]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NDave Airlie <airlied@redhat.com>
      05981422
  7. 26 4月, 2016 4 次提交