/* * Register definitions for Atmel AC97C * * Copyright (C) 2005-2009 Atmel Corporation * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. */ #ifndef __SOUND_ATMEL_AC97C_H #define __SOUND_ATMEL_AC97C_H #define AC97C_MR 0x08 #define AC97C_ICA 0x10 #define AC97C_OCA 0x14 #define AC97C_CARHR 0x20 #define AC97C_CATHR 0x24 #define AC97C_CASR 0x28 #define AC97C_CAMR 0x2c #define AC97C_CORHR 0x40 #define AC97C_COTHR 0x44 #define AC97C_COSR 0x48 #define AC97C_COMR 0x4c #define AC97C_SR 0x50 #define AC97C_IER 0x54 #define AC97C_IDR 0x58 #define AC97C_IMR 0x5c #define AC97C_VERSION 0xfc #define AC97C_CATPR PDC_TPR #define AC97C_CATCR PDC_TCR #define AC97C_CATNPR PDC_TNPR #define AC97C_CATNCR PDC_TNCR #define AC97C_CARPR PDC_RPR #define AC97C_CARCR PDC_RCR #define AC97C_CARNPR PDC_RNPR #define AC97C_CARNCR PDC_RNCR #define AC97C_PTCR PDC_PTCR #define AC97C_MR_ENA (1 << 0) #define AC97C_MR_WRST (1 << 1) #define AC97C_MR_VRA (1 << 2) #define AC97C_CSR_TXRDY (1 << 0) #define AC97C_CSR_TXEMPTY (1 << 1) #define AC97C_CSR_UNRUN (1 << 2) #define AC97C_CSR_RXRDY (1 << 4) #define AC97C_CSR_OVRUN (1 << 5) #define AC97C_CSR_ENDTX (1 << 10) #define AC97C_CSR_ENDRX (1 << 14) #define AC97C_CMR_SIZE_20 (0 << 16) #define AC97C_CMR_SIZE_18 (1 << 16) #define AC97C_CMR_SIZE_16 (2 << 16) #define AC97C_CMR_SIZE_10 (3 << 16) #define AC97C_CMR_CEM_LITTLE (1 << 18) #define AC97C_CMR_CEM_BIG (0 << 18) #define AC97C_CMR_CENA (1 << 21) #define AC97C_CMR_DMAEN (1 << 22) #define AC97C_SR_CAEVT (1 << 3) #define AC97C_SR_COEVT (1 << 2) #define AC97C_SR_WKUP (1 << 1) #define AC97C_SR_SOF (1 << 0) #define AC97C_CH_MASK(slot) \ (0x7 << (3 * (AC97_SLOT_##slot - 3))) #define AC97C_CH_ASSIGN(slot, channel) \ (AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3))) #define AC97C_CHANNEL_NONE 0x0 #define AC97C_CHANNEL_A 0x1 #endif /* __SOUND_ATMEL_AC97C_H */ h=nds-private-remove&id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>commitdiff
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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 /net/irda/irnet
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 'net/irda/irnet')