/* * File: sound/soc/codec/ad73311.h * Based on: * Author: Cliff Cai * * Created: Thur Sep 25, 2008 * Description: definitions for AD73311 registers * * * Modified: * Copyright 2006 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __AD73311_H__ #define __AD73311_H__ #define AD_CONTROL 0x8000 #define AD_DATA 0x0000 #define AD_READ 0x4000 #define AD_WRITE 0x0000 /* Control register A */ #define CTRL_REG_A (0 << 8) #define REGA_MODE_PRO 0x00 #define REGA_MODE_DATA 0x01 #define REGA_MODE_MIXED 0x03 #define REGA_DLB 0x04 #define REGA_SLB 0x08 #define REGA_DEVC(x) ((x & 0x7) << 4) #define REGA_RESET 0x80 /* Control register B */ #define CTRL_REG_B (1 << 8) #define REGB_DIRATE(x) (x & 0x3) #define REGB_SCDIV(x) ((x & 0x3) << 2) #define REGB_MCDIV(x) ((x & 0x7) << 4) #define REGB_CEE (1 << 7) /* Control register C */ #define CTRL_REG_C (2 << 8) #define REGC_PUDEV (1 << 0) #define REGC_PUADC (1 << 3) #define REGC_PUDAC (1 << 4) #define REGC_PUREF (1 << 5) #define REGC_REFUSE (1 << 6) /* Control register D */ #define CTRL_REG_D (3 << 8) #define REGD_IGS(x) (x & 0x7) #define REGD_RMOD (1 << 3) #define REGD_OGS(x) ((x & 0x7) << 4) #define REGD_MUTE (1 << 7) /* Control register E */ #define CTRL_REG_E (4 << 8) #define REGE_DA(x) (x & 0x1f) #define REGE_IBYP (1 << 5) /* Control register F */ #define CTRL_REG_F (5 << 8) #define REGF_SEEN (1 << 5) #define REGF_INV (1 << 6) #define REGF_ALB (1 << 7) #endif dfba96c543e55b6672d5a37e'/>
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authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
commit39cb2c9a316e77f6dfba96c543e55b6672d5a37e (patch)
tree98fe974ee4e20121253de7f61fc8d01bdb3821c1 /sound/synth/emux/emux.c
parent2c5d9555d6d937966d79d4c6529a5f7b9206e405 (diff)
drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()
I've seen this trigger twice now, where the i915_gem_object_to_ggtt() call in intel_unpin_fb_obj() returns NULL, resulting in an oops immediately afterwards as the (inlined) call to i915_vma_unpin_fence() tries to dereference it. It seems to be some race condition where the object is going away at shutdown time, since both times happened when shutting down the X server. The call chains were different: - VT ioctl(KDSETMODE, KD_TEXT): intel_cleanup_plane_fb+0x5b/0xa0 [i915] drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper] intel_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/synth/emux/emux.c')