From 16037643969e095509cd8446a3f8e406a6dc3a2c Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 30 Aug 2018 15:13:16 +0200 Subject: [PATCH 1/8] ALSA: hda - Fix cancel_work_sync() stall from jackpoll work On AMD/ATI controllers, the HD-audio controller driver allows a bus reset upon the error recovery, and its procedure includes the cancellation of pending jack polling work as found in snd_hda_bus_codec_reset(). This works usually fine, but it becomes a problem when the reset happens from the jack poll work itself; then calling cancel_work_sync() from the work being processed tries to wait the finish endlessly. As a workaround, this patch adds the check of current_work() and applies the cancel_work_sync() only when it's not from the jackpoll_work. This doesn't fix the root cause of the reported error below, but at least, it eases the unexpected stall of the whole system. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200937 Cc: Cc: Lukas Wunner Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 0a5085537034..26d348b47867 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3935,7 +3935,8 @@ void snd_hda_bus_reset_codecs(struct hda_bus *bus) list_for_each_codec(codec, bus) { /* FIXME: maybe a better way needed for forced reset */ - cancel_delayed_work_sync(&codec->jackpoll_work); + if (current_work() != &codec->jackpoll_work.work) + cancel_delayed_work_sync(&codec->jackpoll_work); #ifdef CONFIG_PM if (hda_codec_is_power_on(codec)) { hda_call_codec_suspend(codec); From 5a7b44a8df822e0667fc76ed7130252523993bda Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 3 Sep 2018 15:16:43 +0200 Subject: [PATCH 2/8] ALSA: rawmidi: Initialize allocated buffers syzbot reported the uninitialized value exposure in certain situations using virmidi loop. It's likely a very small race at writing and reading, and the influence is almost negligible. But it's safer to paper over this just by replacing the existing kvmalloc() with kvzalloc(). Reported-by: syzbot+194dffdb8b22fc5d207a@syzkaller.appspotmail.com Signed-off-by: Takashi Iwai --- sound/core/rawmidi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 69517e18ef07..08d5662039e3 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -129,7 +129,7 @@ static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) runtime->avail = 0; else runtime->avail = runtime->buffer_size; - runtime->buffer = kvmalloc(runtime->buffer_size, GFP_KERNEL); + runtime->buffer = kvzalloc(runtime->buffer_size, GFP_KERNEL); if (!runtime->buffer) { kfree(runtime); return -ENOMEM; @@ -655,7 +655,7 @@ static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime, if (params->avail_min < 1 || params->avail_min > params->buffer_size) return -EINVAL; if (params->buffer_size != runtime->buffer_size) { - newbuf = kvmalloc(params->buffer_size, GFP_KERNEL); + newbuf = kvzalloc(params->buffer_size, GFP_KERNEL); if (!newbuf) return -ENOMEM; spin_lock_irq(&runtime->lock); From f7c50fa636f72490baceb1664ba64973137266f2 Mon Sep 17 00:00:00 2001 From: Keyon Jie Date: Mon, 3 Sep 2018 10:47:09 +0800 Subject: [PATCH 3/8] ALSA: hda: Fix several mismatch for register mask and value E.g. for snd_hdac_ext_link_clear_stream_id(), we should set (1 << stream) as mask, and 0 as value, here correct it and several similar mismatches. And, here also remove unreadable register_mask usage for those mask value updating. Signed-off-by: Keyon Jie Signed-off-by: Takashi Iwai --- sound/hda/ext/hdac_ext_stream.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c index 1bd27576db98..a835558ddbc9 100644 --- a/sound/hda/ext/hdac_ext_stream.c +++ b/sound/hda/ext/hdac_ext_stream.c @@ -146,7 +146,8 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple); */ void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream) { - snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN); + snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, + AZX_PPLCCTL_RUN, AZX_PPLCCTL_RUN); } EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start); @@ -171,7 +172,8 @@ void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream) snd_hdac_ext_link_stream_clear(stream); - snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST); + snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, + AZX_PPLCCTL_STRST, AZX_PPLCCTL_STRST); udelay(3); timeout = 50; do { @@ -242,7 +244,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id); void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link, int stream) { - snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream)); + snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0); } EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id); @@ -415,7 +417,6 @@ void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus, bool enable, int index) { u32 mask = 0; - u32 register_mask = 0; if (!bus->spbcap) { dev_err(bus->dev, "Address of SPB capability is NULL\n"); @@ -424,12 +425,8 @@ void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus, mask |= (1 << index); - register_mask = readl(bus->spbcap + AZX_REG_SPB_SPBFCCTL); - - mask |= register_mask; - if (enable) - snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask); + snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask); else snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0); } @@ -503,7 +500,6 @@ void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus, bool enable, int index) { u32 mask = 0; - u32 register_mask = 0; if (!bus->drsmcap) { dev_err(bus->dev, "Address of DRSM capability is NULL\n"); @@ -512,12 +508,8 @@ void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus, mask |= (1 << index); - register_mask = readl(bus->drsmcap + AZX_REG_SPB_SPBFCCTL); - - mask |= register_mask; - if (enable) - snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, 0, mask); + snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask); else snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0); } From 38ce57ad164816b432b80feb67d46d53137ff82a Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 2 Sep 2018 10:22:13 +0200 Subject: [PATCH 4/8] ALSA: rme32: Use SNDRV_PCM_INFO_SYNC_APPLPTR info flag The recently introduced PCM info flag assures the call of ack ops at each applptr change, and this is mandatory for the indirect PCM helpers. Also, with the proper ack callback, we need no longer prefill at trigger start. The relevant code can be killed. Reviewed-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/pci/rme32.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c index f0906ba416d4..3ac8c71d567c 100644 --- a/sound/pci/rme32.c +++ b/sound/pci/rme32.c @@ -319,7 +319,8 @@ static const struct snd_pcm_hardware snd_rme32_spdif_info = { SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_SYNC_START), + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE), .rates = (SNDRV_PCM_RATE_32000 | @@ -346,7 +347,8 @@ static const struct snd_pcm_hardware snd_rme32_adat_info = SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_SYNC_START), + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats= SNDRV_PCM_FMTBIT_S16_LE, .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000), @@ -370,7 +372,8 @@ static const struct snd_pcm_hardware snd_rme32_spdif_fd_info = { SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_SYNC_START), + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE), .rates = (SNDRV_PCM_RATE_32000 | @@ -397,7 +400,8 @@ static const struct snd_pcm_hardware snd_rme32_adat_fd_info = SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_SYNC_START), + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats= SNDRV_PCM_FMTBIT_S16_LE, .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000), @@ -1104,16 +1108,6 @@ snd_rme32_pcm_trigger(struct snd_pcm_substream *substream, int cmd) snd_pcm_trigger_done(s, substream); } - /* prefill playback buffer */ - if (cmd == SNDRV_PCM_TRIGGER_START && rme32->fullduplex_mode) { - snd_pcm_group_for_each_entry(s, substream) { - if (s == rme32->playback_substream) { - s->ops->ack(s); - break; - } - } - } - switch (cmd) { case SNDRV_PCM_TRIGGER_START: if (rme32->running && ! RME32_ISWORKING(rme32)) From dc0d1c4519095a6c6bbd9ec4a808674aba502741 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 2 Sep 2018 10:22:37 +0200 Subject: [PATCH 5/8] ALSA: mips: Use SNDRV_PCM_INFO_SYNC_APPLPTR info flag The recently introduced PCM info flag assures the call of ack ops at each applptr change, and this is mandatory for the indirect PCM helpers. Also, with the proper ack callback, we need no longer prefill at trigger start. The relevant code can be killed. Reviewed-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/mips/hal2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/mips/hal2.c b/sound/mips/hal2.c index c8904e732aaa..2bd1cb7489ff 100644 --- a/sound/mips/hal2.c +++ b/sound/mips/hal2.c @@ -500,7 +500,8 @@ static const struct snd_pcm_hardware hal2_pcm_hw = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER), + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = SNDRV_PCM_FMTBIT_S16_BE, .rates = SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, @@ -577,7 +578,6 @@ static int hal2_playback_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_START: hal2->dac.pcm_indirect.hw_io = hal2->dac.buffer_dma; hal2->dac.pcm_indirect.hw_data = 0; - substream->ops->ack(substream); hal2_start_dac(hal2); break; case SNDRV_PCM_TRIGGER_STOP: From 10a23f614dc96ff46087edfc1ffd7e19ff23d8fe Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 2 Sep 2018 10:23:07 +0200 Subject: [PATCH 6/8] ALSA: emu10k1: Use SNDRV_PCM_INFO_SYNC_APPLPTR info flag The recently introduced PCM info flag assures the call of ack ops at each applptr change, and this is mandatory for the indirect PCM helpers. Reviewed-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/pci/emu10k1/emupcm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c index 9f2b6097f486..30b3472d0b75 100644 --- a/sound/pci/emu10k1/emupcm.c +++ b/sound/pci/emu10k1/emupcm.c @@ -1753,7 +1753,8 @@ static const struct snd_pcm_hardware snd_emu10k1_fx8010_playback = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME | - /* SNDRV_PCM_INFO_MMAP_VALID | */ SNDRV_PCM_INFO_PAUSE), + /* SNDRV_PCM_INFO_MMAP_VALID | */ SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_48000, .rate_min = 48000, From b81e7732ce86eb4b2a7804e1210007f8fcbdb7dd Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 2 Sep 2018 10:23:22 +0200 Subject: [PATCH 7/8] ALSA: cs46xx: Use SNDRV_PCM_INFO_SYNC_APPLPTR info flag The recently introduced PCM info flag assures the call of ack ops at each applptr change, and this is mandatory for the indirect PCM helpers. Reviewed-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/pci/cs46xx/cs46xx_lib.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c index 146e1a3498c7..750eec437a79 100644 --- a/sound/pci/cs46xx/cs46xx_lib.c +++ b/sound/pci/cs46xx/cs46xx_lib.c @@ -1443,7 +1443,8 @@ static const struct snd_pcm_hardware snd_cs46xx_playback = .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER /*|*/ - /*SNDRV_PCM_INFO_RESUME*/), + /*SNDRV_PCM_INFO_RESUME*/ | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE), @@ -1465,7 +1466,8 @@ static const struct snd_pcm_hardware snd_cs46xx_capture = .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER /*|*/ - /*SNDRV_PCM_INFO_RESUME*/), + /*SNDRV_PCM_INFO_RESUME*/ | + SNDRV_PCM_INFO_SYNC_APPLPTR), .formats = SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, .rate_min = 5500, From d873d5ea89e39e3224ec873a00414b6861507cac Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 2 Sep 2018 10:26:08 +0200 Subject: [PATCH 8/8] ALSA: mips: Cleanup indirect PCM helper usages We shouldn't set up the indirect PCM parameters at trigger but they should be set at prepare. Also, remove a useless debug message, too. Reviewed-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/mips/hal2.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/sound/mips/hal2.c b/sound/mips/hal2.c index 2bd1cb7489ff..a4ed54aeaf1d 100644 --- a/sound/mips/hal2.c +++ b/sound/mips/hal2.c @@ -564,6 +564,8 @@ static int hal2_playback_prepare(struct snd_pcm_substream *substream) dac->sample_rate = hal2_compute_rate(dac, runtime->rate); memset(&dac->pcm_indirect, 0, sizeof(dac->pcm_indirect)); dac->pcm_indirect.hw_buffer_size = H2_BUF_SIZE; + dac->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2; + dac->pcm_indirect.hw_io = dac->buffer_dma; dac->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream); dac->substream = substream; hal2_setup_dac(hal2); @@ -576,8 +578,6 @@ static int hal2_playback_trigger(struct snd_pcm_substream *substream, int cmd) switch (cmd) { case SNDRV_PCM_TRIGGER_START: - hal2->dac.pcm_indirect.hw_io = hal2->dac.buffer_dma; - hal2->dac.pcm_indirect.hw_data = 0; hal2_start_dac(hal2); break; case SNDRV_PCM_TRIGGER_STOP: @@ -615,7 +615,6 @@ static int hal2_playback_ack(struct snd_pcm_substream *substream) struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); struct hal2_codec *dac = &hal2->dac; - dac->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2; return snd_pcm_indirect_playback_transfer(substream, &dac->pcm_indirect, hal2_playback_transfer); @@ -655,6 +654,7 @@ static int hal2_capture_prepare(struct snd_pcm_substream *substream) memset(&adc->pcm_indirect, 0, sizeof(adc->pcm_indirect)); adc->pcm_indirect.hw_buffer_size = H2_BUF_SIZE; adc->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2; + adc->pcm_indirect.hw_io = adc->buffer_dma; adc->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream); adc->substream = substream; hal2_setup_adc(hal2); @@ -667,9 +667,6 @@ static int hal2_capture_trigger(struct snd_pcm_substream *substream, int cmd) switch (cmd) { case SNDRV_PCM_TRIGGER_START: - hal2->adc.pcm_indirect.hw_io = hal2->adc.buffer_dma; - hal2->adc.pcm_indirect.hw_data = 0; - printk(KERN_DEBUG "buffer_dma %x\n", hal2->adc.buffer_dma); hal2_start_adc(hal2); break; case SNDRV_PCM_TRIGGER_STOP: