[PATCH 4.2.y-ckt 28/70] drm/udl: Use unlocked gem unreferencing

From	Kamal Mostafa <kamal@canonical.com>
Newsgroups	linux.kernel
Subject	[PATCH 4.2.y-ckt 28/70] drm/udl: Use unlocked gem unreferencing
Date	2016-04-12 23:40 +0200
Message-ID	<rnecs-5Ws-41@gated-at.bofh.it> (permalink)
References	<rndzH-5be-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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4.2.8-ckt8 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Daniel Vetter <daniel.vetter@ffwll.ch>

commit 72b9ff0612ad8fc969b910cd00ac16b57a1a9ba4 upstream.

For drm_gem_object_unreference callers are required to hold
dev->struct_mutex, which these paths don't. Enforcing this requirement
has become a bit more strict with

commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Oct 15 09:36:25 2015 +0200

    drm/gem: Check locking in drm_gem_object_unreference

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/gpu/drm/udl/udl_fb.c  | 2 +-
 drivers/gpu/drm/udl/udl_gem.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 5fc16ce..cd8d183 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -546,7 +546,7 @@ static int udlfb_create(struct drm_fb_helper *helper,
 
 	return ret;
 out_gfree:
-	drm_gem_object_unreference(&ufbdev->ufb.obj->base);
+	drm_gem_object_unreference_unlocked(&ufbdev->ufb.obj->base);
 out:
 	return ret;
 }
diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 2a0a784..d7528e0 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -52,7 +52,7 @@ udl_gem_create(struct drm_file *file,
 		return ret;
 	}
 
-	drm_gem_object_unreference(&obj->base);
+	drm_gem_object_unreference_unlocked(&obj->base);
 	*handle_p = handle;
 	return 0;
 }
-- 
2.7.4

Thread

[4.2.y-ckt stable] Linux 4.2.8-ckt8 stable review Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 69/70] mwifiex: fix corner case association failure Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 35/70] ext4: ignore quota mount options if the quota feature is enabled Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 64/70] lib/ucs2_string: Correct ucs2 -> utf8 conversion Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 63/70] efi: Add pstore variables to the deletion whitelist Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 65/70] ipr: Fix out-of-bounds null overwrite Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 22/70] USB: cypress_m8: add endpoint sanity check Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 62/70] efi: Make efivarfs entries immutable by default Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 61/70] efi: Make our variable validation list include the guid Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 09/70] hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 70/70] net: phy: at803x: Request 'reset' GPIO only for AT8030 PHY Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:00 +0200
  [PATCH 4.2.y-ckt 42/70] USB: serial: ftdi_sio: Add support for ICP DAS I-756xU devices Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 49/70] parisc: Fix kernel crash with reversed copy_from_user() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 55/70] pinctrl: nomadik: fix pull debug print inversion Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 38/70] mac80211: properly deal with station hashtable insert errors Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 39/70] compiler-gcc: disable -ftracer for __noclone functions Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 47/70] gpio: pca953x: Use correct u16 value for register word write Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 36/70] xen/events: Mask a moving irq Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 43/70] USB: serial: cp210x: Adding GE Healthcare Device ID Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 41/70] Btrfs: fix file/data loss caused by fsync after rename and new inode Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 33/70] mm: fix invalid node in alloc_migrate_target() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 57/70] KVM: x86: move steal time initialization to vcpu entry time Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 37/70] usb: renesas_usbhs: fix to avoid using a disabled ep in usbhsg_queue_done() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 40/70] rbd: use GFP_NOIO consistently for request allocations Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 50/70] parisc: Unbreak handling exceptions from kernel modules Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 52/70] net: bcmgenet: fix dev->stats.tx_bytes accounting Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 31/70] KVM: x86: Inject pending interrupt even if pending nmi exist Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 34/70] iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 48/70] parisc: Avoid function pointers for kernel exception routines Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 56/70] ip6_tunnel: set rtnl_link_ops before calling register_netdevice Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 45/70] virtio: virtio 1.0 cs04 spec compliance for reset Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 54/70] ipv6: udp: fix UDP_MIB_IGNOREDMULTI updates Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 44/70] USB: option: add "D-Link DWM-221 B1" device id Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:30 +0200
  [PATCH 4.2.y-ckt 30/70] ALSA: hda - fix front mic problem for a HP desktop Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 27/70] drm/dp: move hw_mutex up the call stack Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 08/70] nfs: use file_dentry() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 24/70] [media] au0828: fix au0828_v4l2_close() dev_state race condition Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 02/70] PKCS#7: pkcs7_validate_trust(): initialize the _trusted output argument Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 16/70] usb: renesas_usbhs: avoid NULL pointer derefernce in usbhsf_pkt_handler() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 10/70] drm/radeon: add another R7 370 quirk Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 20/70] ALSA: usb-audio: Fix double-free in error paths after snd_usb_add_audio_stream() call Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 05/70] ALSA: hda - Apply fix for white noise on Asus N550JV, too Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 26/70] sd: Fix excessive capacity printing on devices with blocks bigger than 512 bytes Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 23/70] USB: digi_acceleport: do sanity checking for the number of ports Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 32/70] ALSA: timer: Use mod_timer() for rearming the system timer Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 14/70] pinctrl: pistachio: fix mfio84-89 function description and pinmux. Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 15/70] pinctrl: sunxi: Fix A33 external interrupts not working Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 28/70] drm/udl: Use unlocked gem unreferencing Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 03/70] ALSA: hda - Asus N750JV external subwoofer fixup Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 12/70] powerpc/mm: Fixup preempt underflow with huge pages Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 04/70] ALSA: hda - Fix white noise on Asus N750JV headphone Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 18/70] btrfs: fix crash/invalid memory access on fsync when using overlayfs Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 29/70] ext4: add lockdep annotations for i_data_sem Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 11/70] drm/radeon: add a dpm quirk for all R7 370 parts Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 13/70] pinctrl: sh-pfc: only use dummy states for non-DT platforms Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 17/70] usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 21/70] USB: mct_u232: add sanity checking in probe Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 25/70] [media] au0828: Fix dev_state handling Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200
  [PATCH 4.2.y-ckt 07/70] fs: add file_dentry() Kamal Mostafa <kamal@canonical.com> - 2016-04-12 23:40 +0200

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