/* * Copyright (c) by Jaroslav Kysela * Creative Labs, Inc. * Routines for IRQ control of EMU10K1 chips * * BUGS: * -- * * TODO: * -- * * 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 #include irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id) { struct snd_emu10k1 *emu = dev_id; unsigned int status, status2, orig_status, orig_status2; int handled = 0; int timeout = 0; while (((status = inl(emu->port + IPR)) != 0) && (timeout < 1000)) { timeout++; orig_status = status; handled = 1; if ((status & 0xffffffff) == 0xffffffff) { dev_info(emu->card->dev, "Suspected sound card removal\n"); break; } if (status & IPR_PCIERROR) { dev_err(emu->card->dev, "interrupt: PCI error\n"); snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE); status &= ~IPR_PCIERROR; } if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) { if (emu->hwvol_interrupt) emu->hwvol_interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE); status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE); } if (status & IPR_CHANNELLOOP) { int voice; int voice_max = status & IPR_CHANNELNUMBERMASK; u32 val; struct snd_emu10k1_voice *pvoice = emu->voices; val = snd_emu10k1_ptr_read(emu, CLIPL, 0); for (voice = 0; voice <= voice_max; voice++) { if (voice == 0x20) val = snd_emu10k1_ptr_read(emu, CLIPH, 0); if (val & 1) { if (pvoice->use && pvoice->interrupt != NULL) { pvoice->interrupt(emu, pvoice); snd_emu10k1_voice_intr_ack(emu, voice); } else { snd_emu10k1_voice_intr_disable(emu, voice); } } val >>= 1; pvoice++; } val = snd_emu10k1_ptr_read(emu, HLIPL, 0); for (voice = 0; voice <= voice_max; voice++) { if (voice == 0x20) val = snd_emu10k1_ptr_read(emu, HLIPH, 0); if (val & 1) { if (pvoice->use && pvoice->interrupt != NULL) { pvoice->interrupt(emu, pvoice); snd_emu10k1_voice_half_loop_intr_ack(emu, voice); } else { snd_emu10k1_voice_half_loop_intr_disable(emu, voice); } } val >>= 1; pvoice++; } status &= ~IPR_CHANNELLOOP; } status &= ~IPR_CHANNELNUMBERMASK; if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) { if (emu->capture_interrupt) emu->capture_interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE); status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL); } if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) { if (emu->capture_mic_interrupt) emu->capture_mic_interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE); status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL); } if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) { if (emu->capture_efx_interrupt) emu->capture_efx_interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE); status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL); } if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) { if (emu->midi.interrupt) emu->midi.interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE); status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY); } if (status & (IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2)) { if (emu->midi2.interrupt) emu->midi2.interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_A_MIDITXENABLE2|INTE_A_MIDIRXENABLE2); status &= ~(IPR_A_MIDITRANSBUFEMPTY2|IPR_A_MIDIRECVBUFEMPTY2); } if (status & IPR_INTERVALTIMER) { if (emu->timer) snd_timer_interrupt(emu->timer, emu->timer->sticks); else snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB); status &= ~IPR_INTERVALTIMER; } if (status & (IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE)) { if (emu->spdif_interrupt) emu->spdif_interrupt(emu, status); else snd_emu10k1_intr_disable(emu, INTE_GPSPDIFENABLE|INTE_CDSPDIFENABLE); status &= ~(IPR_GPSPDIFSTATUSCHANGE|IPR_CDROMSTATUSCHANGE); } if (status & IPR_FXDSP) { if (emu->dsp_interrupt) emu->dsp_interrupt(emu); else snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE); status &= ~IPR_FXDSP; } if (status & IPR_P16V) { while ((status2 = inl(emu->port + IPR2)) != 0) { u32 mask = INTE2_PLAYBACK_CH_0_LOOP; /* Full Loop */ struct snd_emu10k1_voice *pvoice = &(emu->p16v_voices[0]); struct snd_emu10k1_voice *cvoice = &(emu->p16v_capture_voice); /* dev_dbg(emu->card->dev, "status2=0x%x\n", status2); */ orig_status2 = status2; if(status2 & mask) { if(pvoice->use) { snd_pcm_period_elapsed(pvoice->epcm->substream); } else { dev_err(emu->card->dev, "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n", status2, mask, pvoice, pvoice->use); } } if(status2 & 0x110000) { /* dev_info(emu->card->dev, "capture int found\n"); */ if(cvoice->use) { /* dev_info(emu->card->dev, "capture period_elapsed\n"); */ snd_pcm_period_elapsed(cvoice->epcm->substream); } } outl(orig_status2, emu->port + IPR2); /* ack all */ } status &= ~IPR_P16V; } if (status) { unsigned int bits; dev_err(emu->card->dev, "unhandled interrupt: 0x%08x\n", status); //make sure any interrupts we don't handle are disabled: bits = INTE_FXDSPENABLE | INTE_PCIERRORENABLE | INTE_VOLINCRENABLE | INTE_VOLDECRENABLE | INTE_MUTEENABLE | INTE_MICBUFENABLE | INTE_ADCBUFENABLE | INTE_EFXBUFENABLE | INTE_GPSPDIFENABLE | INTE_CDSPDIFENABLE | INTE_INTERVALTIMERENB | INTE_MIDITXENABLE | INTE_MIDIRXENABLE; if (emu->audigy) bits |= INTE_A_MIDITXENABLE2 | INTE_A_MIDIRXENABLE2; snd_emu10k1_intr_disable(emu, bits); } outl(orig_status, emu->port + IPR); /* ack all */ } if (timeout == 1000) dev_info(emu->card->dev, "emu10k1 irq routine failure\n"); return IRQ_RETVAL(handled); } 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/nfs/nfs4file.c')