#ifndef __SOUND_AK4531_CODEC_H #define __SOUND_AK4531_CODEC_H /* * Copyright (c) by Jaroslav Kysela * Universal interface for Audio Codec '97 * * For more details look to AC '97 component specification revision 2.1 * by Intel Corporation (http://developer.intel.com). * * * 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include /* * ASAHI KASEI - AK4531 codec * - not really AC'97 codec, but it uses very similar interface as AC'97 */ /* * AK4531 codec registers */ #define AK4531_LMASTER 0x00 /* master volume left */ #define AK4531_RMASTER 0x01 /* master volume right */ #define AK4531_LVOICE 0x02 /* channel volume left */ #define AK4531_RVOICE 0x03 /* channel volume right */ #define AK4531_LFM 0x04 /* FM volume left */ #define AK4531_RFM 0x05 /* FM volume right */ #define AK4531_LCD 0x06 /* CD volume left */ #define AK4531_RCD 0x07 /* CD volume right */ #define AK4531_LLINE 0x08 /* LINE volume left */ #define AK4531_RLINE 0x09 /* LINE volume right */ #define AK4531_LAUXA 0x0a /* AUXA volume left */ #define AK4531_RAUXA 0x0b /* AUXA volume right */ #define AK4531_MONO1 0x0c /* MONO1 volume left */ #define AK4531_MONO2 0x0d /* MONO1 volume right */ #define AK4531_MIC 0x0e /* MIC volume */ #define AK4531_MONO_OUT 0x0f /* Mono-out volume */ #define AK4531_OUT_SW1 0x10 /* Output mixer switch 1 */ #define AK4531_OUT_SW2 0x11 /* Output mixer switch 2 */ #define AK4531_LIN_SW1 0x12 /* Input left mixer switch 1 */ #define AK4531_RIN_SW1 0x13 /* Input right mixer switch 1 */ #define AK4531_LIN_SW2 0x14 /* Input left mixer switch 2 */ #define AK4531_RIN_SW2 0x15 /* Input right mixer switch 2 */ #define AK4531_RESET 0x16 /* Reset & power down */ #define AK4531_CLOCK 0x17 /* Clock select */ #define AK4531_AD_IN 0x18 /* AD input select */ #define AK4531_MIC_GAIN 0x19 /* MIC amplified gain */ struct snd_ak4531 { void (*write) (struct snd_ak4531 *ak4531, unsigned short reg, unsigned short val); void *private_data; void (*private_free) (struct snd_ak4531 *ak4531); /* --- */ unsigned char regs[0x20]; struct mutex reg_mutex; }; int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531, struct snd_ak4531 **rak4531); #ifdef CONFIG_PM void snd_ak4531_suspend(struct snd_ak4531 *ak4531); void snd_ak4531_resume(struct snd_ak4531 *ak4531); #endif #endif /* __SOUND_AK4531_CODEC_H */ /option>space:mode:
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 /fs
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 'fs')