From 3d016d57fdc5e6caa4cd67896f4b081bccad6e2c Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Mon, 3 Apr 2017 21:13:40 +0900 Subject: ALSA: oxfw: fix regression to handle Stanton SCS.1m/1d At a commit 6c29230e2a5f ("ALSA: oxfw: delayed registration of sound card"), ALSA oxfw driver fails to handle SCS.1m/1d, due to -EBUSY at a call of snd_card_register(). The cause is that the driver manages to register two rawmidi instances with the same device number 0. This is a regression introduced since kernel 4.7. This commit fixes the regression, by fixing up device property after discovering stream formats. Fixes: 6c29230e2a5f ("ALSA: oxfw: delayed registration of sound card") Cc: # 4.7+ Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/oxfw/oxfw.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c index 74d7fb6efce6..413ab6313bb6 100644 --- a/sound/firewire/oxfw/oxfw.c +++ b/sound/firewire/oxfw/oxfw.c @@ -227,11 +227,11 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - err = detect_quirks(oxfw); + err = snd_oxfw_stream_discover(oxfw); if (err < 0) goto error; - err = snd_oxfw_stream_discover(oxfw); + err = detect_quirks(oxfw); if (err < 0) goto error; -- cgit v1.2.3 From d05d862ead8eca5e7d4ccf82d39d9189579ee5b1 Mon Sep 17 00:00:00 2001 From: Arnaud Pouliquen Date: Tue, 28 Mar 2017 15:04:55 +0200 Subject: ASoC: STI: Fix null ptr deference in IRQ handler With RTlinux a race condition has been found that leads to NULL ptr crash: - On CPU 0: uni_player_irq_handler is called to treat XRUN "(player->state == UNIPERIF_STATE_STOPPED)" is FALSE so status is checked, dev_err(player->dev, "FIFO underflow error detected") is printed and then snd_pcm_stream_lock should be called to lock stream for stopping. - On CPU 1: application stop and close the stream. Issue is that the stop and shutdown functions are executed while "FIFO underflow error detected" is printed. So when CPU 0 calls snd_pcm_stream_lock, player->substream is already null. Signed-off-by: Arnaud Pouliquen Signed-off-by: Mark Brown --- sound/soc/sti/uniperif.h | 1 + sound/soc/sti/uniperif_player.c | 35 ++++++++++++++++++++++++----------- sound/soc/sti/uniperif_reader.c | 24 ++++++++++++++++++++---- 3 files changed, 45 insertions(+), 15 deletions(-) diff --git a/sound/soc/sti/uniperif.h b/sound/soc/sti/uniperif.h index d487dd2ef016..cfcb0ea9d99d 100644 --- a/sound/soc/sti/uniperif.h +++ b/sound/soc/sti/uniperif.h @@ -1299,6 +1299,7 @@ struct uniperif { int ver; /* IP version, used by register access macros */ struct regmap_field *clk_sel; struct regmap_field *valid_sel; + spinlock_t irq_lock; /* use to prevent race condition with IRQ */ /* capabilities */ const struct snd_pcm_hardware *hw; diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c index 60ae31a303ab..d7e8dd46d2cc 100644 --- a/sound/soc/sti/uniperif_player.c +++ b/sound/soc/sti/uniperif_player.c @@ -65,10 +65,13 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) unsigned int status; unsigned int tmp; - if (player->state == UNIPERIF_STATE_STOPPED) { - /* Unexpected IRQ: do nothing */ - return IRQ_NONE; - } + spin_lock(&player->irq_lock); + if (!player->substream) + goto irq_spin_unlock; + + snd_pcm_stream_lock(player->substream); + if (player->state == UNIPERIF_STATE_STOPPED) + goto stream_unlock; /* Get interrupt status & clear them immediately */ status = GET_UNIPERIF_ITS(player); @@ -88,9 +91,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player); /* Stop the player */ - snd_pcm_stream_lock(player->substream); snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); - snd_pcm_stream_unlock(player->substream); } ret = IRQ_HANDLED; @@ -104,9 +105,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player); /* Stop the player */ - snd_pcm_stream_lock(player->substream); snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); - snd_pcm_stream_unlock(player->substream); ret = IRQ_HANDLED; } @@ -116,7 +115,8 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) if (!player->underflow_enabled) { dev_err(player->dev, "unexpected Underflow recovering\n"); - return -EPERM; + ret = -EPERM; + goto stream_unlock; } /* Read the underflow recovery duration */ tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player); @@ -138,13 +138,16 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id) dev_err(player->dev, "Underflow recovery failed\n"); /* Stop the player */ - snd_pcm_stream_lock(player->substream); snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN); - snd_pcm_stream_unlock(player->substream); ret = IRQ_HANDLED; } +stream_unlock: + snd_pcm_stream_unlock(player->substream); +irq_spin_unlock: + spin_unlock(&player->irq_lock); + return ret; } @@ -588,6 +591,7 @@ static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol, struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); struct uniperif *player = priv->dai_data.uni; struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958; + unsigned long flags; mutex_lock(&player->ctrl_lock); iec958->status[0] = ucontrol->value.iec958.status[0]; @@ -596,12 +600,14 @@ static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol, iec958->status[3] = ucontrol->value.iec958.status[3]; mutex_unlock(&player->ctrl_lock); + spin_lock_irqsave(&player->irq_lock, flags); if (player->substream && player->substream->runtime) uni_player_set_channel_status(player, player->substream->runtime); else uni_player_set_channel_status(player, NULL); + spin_unlock_irqrestore(&player->irq_lock, flags); return 0; } @@ -686,9 +692,12 @@ static int uni_player_startup(struct snd_pcm_substream *substream, { struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); struct uniperif *player = priv->dai_data.uni; + unsigned long flags; int ret; + spin_lock_irqsave(&player->irq_lock, flags); player->substream = substream; + spin_unlock_irqrestore(&player->irq_lock, flags); player->clk_adj = 0; @@ -986,12 +995,15 @@ static void uni_player_shutdown(struct snd_pcm_substream *substream, { struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); struct uniperif *player = priv->dai_data.uni; + unsigned long flags; + spin_lock_irqsave(&player->irq_lock, flags); if (player->state != UNIPERIF_STATE_STOPPED) /* Stop the player */ uni_player_stop(player); player->substream = NULL; + spin_unlock_irqrestore(&player->irq_lock, flags); } static int uni_player_parse_dt_audio_glue(struct platform_device *pdev, @@ -1096,6 +1108,7 @@ int uni_player_init(struct platform_device *pdev, } mutex_init(&player->ctrl_lock); + spin_lock_init(&player->irq_lock); /* Ensure that disabled by default */ SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player); diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c index 93a8df6ed880..ee0055e60852 100644 --- a/sound/soc/sti/uniperif_reader.c +++ b/sound/soc/sti/uniperif_reader.c @@ -46,10 +46,15 @@ static irqreturn_t uni_reader_irq_handler(int irq, void *dev_id) struct uniperif *reader = dev_id; unsigned int status; + spin_lock(&reader->irq_lock); + if (!reader->substream) + goto irq_spin_unlock; + + snd_pcm_stream_lock(reader->substream); if (reader->state == UNIPERIF_STATE_STOPPED) { /* Unexpected IRQ: do nothing */ dev_warn(reader->dev, "unexpected IRQ\n"); - return IRQ_HANDLED; + goto stream_unlock; } /* Get interrupt status & clear them immediately */ @@ -60,13 +65,16 @@ static irqreturn_t uni_reader_irq_handler(int irq, void *dev_id) if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(reader))) { dev_err(reader->dev, "FIFO error detected\n"); - snd_pcm_stream_lock(reader->substream); snd_pcm_stop(reader->substream, SNDRV_PCM_STATE_XRUN); - snd_pcm_stream_unlock(reader->substream); - return IRQ_HANDLED; + ret = IRQ_HANDLED; } +stream_unlock: + snd_pcm_stream_unlock(reader->substream); +irq_spin_unlock: + spin_unlock(&reader->irq_lock); + return ret; } @@ -347,9 +355,12 @@ static int uni_reader_startup(struct snd_pcm_substream *substream, { struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); struct uniperif *reader = priv->dai_data.uni; + unsigned long flags; int ret; + spin_lock_irqsave(&reader->irq_lock, flags); reader->substream = substream; + spin_unlock_irqrestore(&reader->irq_lock, flags); if (!UNIPERIF_TYPE_IS_TDM(reader)) return 0; @@ -375,12 +386,15 @@ static void uni_reader_shutdown(struct snd_pcm_substream *substream, { struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); struct uniperif *reader = priv->dai_data.uni; + unsigned long flags; + spin_lock_irqsave(&reader->irq_lock, flags); if (reader->state != UNIPERIF_STATE_STOPPED) { /* Stop the reader */ uni_reader_stop(reader); } reader->substream = NULL; + spin_unlock_irqrestore(&reader->irq_lock, flags); } static const struct snd_soc_dai_ops uni_reader_dai_ops = { @@ -415,6 +429,8 @@ int uni_reader_init(struct platform_device *pdev, return -EBUSY; } + spin_lock_init(&reader->irq_lock); + return 0; } EXPORT_SYMBOL_GPL(uni_reader_init); -- cgit v1.2.3 From b6e38b2944f1153199becefb14ae3ee01778863e Mon Sep 17 00:00:00 2001 From: Mousumi Jana Date: Tue, 11 Apr 2017 13:06:22 +0530 Subject: ASoC: topology: Fix to store enum text values Add missing enum texts store in soc_enum. Signed-off-by: Mousumi Jana Signed-off-by: Pardha Saradhi K Signed-off-by: Kranthikumar, GudishaX Signed-off-by: Subhransu S. Prusty Acked-by: Liam Girdwood Signed-off-by: Mark Brown --- sound/soc/soc-topology.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c index 65670b2b408c..8e3df8ba9b68 100644 --- a/sound/soc/soc-topology.c +++ b/sound/soc/soc-topology.c @@ -934,6 +934,7 @@ static int soc_tplg_denum_create_texts(struct soc_enum *se, } } + se->texts = (const char * const *)se->dobj.control.dtexts; return 0; err: -- cgit v1.2.3 From 4e7655fd4f47c23e5249ea260dc802f909a64611 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sun, 9 Apr 2017 10:41:27 +0200 Subject: ALSA: seq: Don't break snd_use_lock_sync() loop by timeout The snd_use_lock_sync() (thus its implementation snd_use_lock_sync_helper()) has the 5 seconds timeout to break out of the sync loop. It was introduced from the beginning, just to be "safer", in terms of avoiding the stupid bugs. However, as Ben Hutchings suggested, this timeout rather introduces a potential leak or use-after-free that was apparently fixed by the commit 2d7d54002e39 ("ALSA: seq: Fix race during FIFO resize"): for example, snd_seq_fifo_event_in() -> snd_seq_event_dup() -> copy_from_user() could block for a long time, and snd_use_lock_sync() goes timeout and still leaves the cell at releasing the pool. For fixing such a problem, we remove the break by the timeout while still keeping the warning. Suggested-by: Ben Hutchings Cc: Signed-off-by: Takashi Iwai --- sound/core/seq/seq_lock.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/sound/core/seq/seq_lock.c b/sound/core/seq/seq_lock.c index 3b693e924db7..12ba83367b1b 100644 --- a/sound/core/seq/seq_lock.c +++ b/sound/core/seq/seq_lock.c @@ -28,19 +28,16 @@ /* wait until all locks are released */ void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line) { - int max_count = 5 * HZ; + int warn_count = 5 * HZ; if (atomic_read(lockp) < 0) { pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line); return; } while (atomic_read(lockp) > 0) { - if (max_count == 0) { - pr_warn("ALSA: seq_lock: timeout [%d left] in %s:%d\n", atomic_read(lockp), file, line); - break; - } + if (warn_count-- == 0) + pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line); schedule_timeout_uninterruptible(1); - max_count--; } } -- cgit v1.2.3 From dfb00a56935186171abb5280b3407c3f910011f1 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Fri, 14 Apr 2017 12:43:01 +0900 Subject: ALSA: firewire-lib: fix inappropriate assignment between signed/unsigned type An abstraction of asynchronous transaction for transmission of MIDI messages was introduced in Linux v4.4. Each driver can utilize this abstraction to transfer MIDI messages via fixed-length payload of transaction to a certain unit address. Filling payload of the transaction is done by callback. In this callback, each driver can return negative error code, however current implementation assigns the return value to unsigned variable. This commit changes type of the variable to fix the bug. Reported-by: Julia Lawall Cc: # 4.4+ Fixes: 585d7cba5e1f ("ALSA: firewire-lib: add helper functions for asynchronous transactions to transfer MIDI messages") Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/lib.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/firewire/lib.h b/sound/firewire/lib.h index f6769312ebfc..c3768cd494a5 100644 --- a/sound/firewire/lib.h +++ b/sound/firewire/lib.h @@ -45,7 +45,7 @@ struct snd_fw_async_midi_port { struct snd_rawmidi_substream *substream; snd_fw_async_midi_port_fill fill; - unsigned int consume_bytes; + int consume_bytes; }; int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port, -- cgit v1.2.3 From 6e4cac23c5a648d50b107d1b53e9c4e1120c7943 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 24 Apr 2017 14:09:55 +0200 Subject: ASoC: intel: Fix PM and non-atomic crash in bytcr drivers The FE setups of Intel SST bytcr_rt5640 and bytcr_rt5651 drivers carry the ignore_suspend flag, and this prevents the suspend/resume working properly while the stream is running, since SST core code has the check of the running streams and returns -EBUSY. Drop these superfluous flags for fixing the behavior. Also, the bytcr_rt5640 driver lacks of nonatomic flag in some FE definitions, which leads to the kernel Oops at suspend/resume like: BUG: scheduling while atomic: systemd-sleep/3144/0x00000003 Call Trace: dump_stack+0x5c/0x7a __schedule_bug+0x55/0x70 __schedule+0x63c/0x8c0 schedule+0x3d/0x90 schedule_timeout+0x16b/0x320 ? del_timer_sync+0x50/0x50 ? sst_wait_timeout+0xa9/0x170 [snd_intel_sst_core] ? sst_wait_timeout+0xa9/0x170 [snd_intel_sst_core] ? remove_wait_queue+0x60/0x60 ? sst_prepare_and_post_msg+0x275/0x960 [snd_intel_sst_core] ? sst_pause_stream+0x9b/0x110 [snd_intel_sst_core] .... This patch addresses these appropriately, too. Signed-off-by: Takashi Iwai Acked-by: Vinod Koul Signed-off-by: Mark Brown Cc: # v4.1+ --- sound/soc/intel/boards/bytcr_rt5640.c | 4 ++-- sound/soc/intel/boards/bytcr_rt5651.c | 2 -- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c index 5c7219fb3aa8..9e2a3404a836 100644 --- a/sound/soc/intel/boards/bytcr_rt5640.c +++ b/sound/soc/intel/boards/bytcr_rt5640.c @@ -621,7 +621,7 @@ static struct snd_soc_dai_link byt_rt5640_dais[] = { .codec_dai_name = "snd-soc-dummy-dai", .codec_name = "snd-soc-dummy", .platform_name = "sst-mfld-platform", - .ignore_suspend = 1, + .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, .dpcm_capture = 1, @@ -634,7 +634,6 @@ static struct snd_soc_dai_link byt_rt5640_dais[] = { .codec_dai_name = "snd-soc-dummy-dai", .codec_name = "snd-soc-dummy", .platform_name = "sst-mfld-platform", - .ignore_suspend = 1, .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, @@ -661,6 +660,7 @@ static struct snd_soc_dai_link byt_rt5640_dais[] = { | SND_SOC_DAIFMT_CBS_CFS, .be_hw_params_fixup = byt_rt5640_codec_fixup, .ignore_suspend = 1, + .nonatomic = true, .dpcm_playback = 1, .dpcm_capture = 1, .init = byt_rt5640_init, diff --git a/sound/soc/intel/boards/bytcr_rt5651.c b/sound/soc/intel/boards/bytcr_rt5651.c index 3186f015939f..8164bec63bf1 100644 --- a/sound/soc/intel/boards/bytcr_rt5651.c +++ b/sound/soc/intel/boards/bytcr_rt5651.c @@ -235,7 +235,6 @@ static struct snd_soc_dai_link byt_rt5651_dais[] = { .codec_dai_name = "snd-soc-dummy-dai", .codec_name = "snd-soc-dummy", .platform_name = "sst-mfld-platform", - .ignore_suspend = 1, .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, @@ -249,7 +248,6 @@ static struct snd_soc_dai_link byt_rt5651_dais[] = { .codec_dai_name = "snd-soc-dummy-dai", .codec_name = "snd-soc-dummy", .platform_name = "sst-mfld-platform", - .ignore_suspend = 1, .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, -- cgit v1.2.3