[Intel-gfx] [drm-intel:drm-intel-nightly 1066/1091] drivers/gpu/drm/drm_plane.c:933:48-49: ERROR: reference preceded by free on line 926 (fwd)

[Julia Lawall]

The kfree on line 926 would only be a problem for the references to e on
lines 933 and 937 if the return value of drm_event_reserve_init can be
-EDEADLK.

julia

---------- Forwarded message ----------
Date: Thu, 30 Mar 2017 00:48:54 +0800
From: kbuild test robot <fengguang.wu at intel.com>
To: kbuild at 01.org
Cc: Julia Lawall <julia.lawall at lip6.fr>
Subject: [drm-intel:drm-intel-nightly 1066/1091]
    drivers/gpu/drm/drm_plane.c:933:48-49: ERROR: reference preceded by free on
    line 926

tree:   git://anongit.freedesktop.org/drm-intel drm-intel-nightly
head:   2f9f22b419350cafb06ba7e5342bc461fcb0afca
commit: 29dc0d1de18239cf3ef8bab578b8321ed340d81c [1066/1091] drm: Roll out acquire context for the page_flip ioctl
:::::: branch date: 4 hours ago
:::::: commit date: 9 hours ago

>> drivers/gpu/drm/drm_plane.c:933:48-49: ERROR: reference preceded by free on line 926
   drivers/gpu/drm/drm_plane.c:937:41-42: ERROR: reference preceded by free on line 926

git remote add drm-intel git://anongit.freedesktop.org/drm-intel
git remote update drm-intel
git checkout 29dc0d1de18239cf3ef8bab578b8321ed340d81c
vim +933 drivers/gpu/drm/drm_plane.c

43968d7b Daniel Vetter 2016-09-21  920  		}
43968d7b Daniel Vetter 2016-09-21  921  		e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
43968d7b Daniel Vetter 2016-09-21  922  		e->event.base.length = sizeof(e->event);
43968d7b Daniel Vetter 2016-09-21  923  		e->event.user_data = page_flip->user_data;
43968d7b Daniel Vetter 2016-09-21  924  		ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
43968d7b Daniel Vetter 2016-09-21  925  		if (ret) {
43968d7b Daniel Vetter 2016-09-21 @926  			kfree(e);
43968d7b Daniel Vetter 2016-09-21  927  			goto out;
43968d7b Daniel Vetter 2016-09-21  928  		}
43968d7b Daniel Vetter 2016-09-21  929  	}
43968d7b Daniel Vetter 2016-09-21  930
43968d7b Daniel Vetter 2016-09-21  931  	crtc->primary->old_fb = crtc->primary->fb;
43968d7b Daniel Vetter 2016-09-21  932  	if (crtc->funcs->page_flip_target)
43968d7b Daniel Vetter 2016-09-21 @933  		ret = crtc->funcs->page_flip_target(crtc, fb, e,
43968d7b Daniel Vetter 2016-09-21  934  						    page_flip->flags,
43968d7b Daniel Vetter 2016-09-21  935  						    target_vblank);
43968d7b Daniel Vetter 2016-09-21  936  	else

:::::: The code at line 933 was first introduced by commit
:::::: 43968d7b806d7a7e021261294c583a216fddf0e5 drm: Extract drm_plane.[hc]

:::::: TO: Daniel Vetter <daniel.vetter at ffwll.ch>
:::::: CC: Sean Paul <seanpaul at chromium.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation