diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0437-staging-bcm2835-audio-Clean-up-mutex-locks.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0437-staging-bcm2835-audio-Clean-up-mutex-locks.patch | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0437-staging-bcm2835-audio-Clean-up-mutex-locks.patch b/target/linux/brcm2708/patches-4.19/950-0437-staging-bcm2835-audio-Clean-up-mutex-locks.patch deleted file mode 100644 index dfa0573510..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0437-staging-bcm2835-audio-Clean-up-mutex-locks.patch +++ /dev/null @@ -1,301 +0,0 @@ -From 2dc2366eddba3b7a59d1f19b7ce13f7a52574d63 Mon Sep 17 00:00:00 2001 -From: Takashi Iwai <tiwai@suse.de> -Date: Tue, 4 Sep 2018 17:58:30 +0200 -Subject: [PATCH 437/725] staging: bcm2835-audio: Clean up mutex locks - -commit ce4bb1aa271a97047b80ac917a5d91b54925913b upstream. - -snd-bcm2835 driver takes the lock with mutex_lock_interruptible() in -all places, which don't make sense. Replace them with the simple -mutex_lock(). - -Also taking a mutex lock right after creating it for each PCM object -is nonsense, too. It cannot be racy at that point. We can get rid of -it. - -Last but not least, initializing chip->audio_mutex at each place is -error-prone. Initialize properly at creating the chip object in -snd_bcm2835_create() instead. - -Signed-off-by: Takashi Iwai <tiwai@suse.de> -Tested-by: Stefan Wahren <stefan.wahren@i2se.com> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - .../vc04_services/bcm2835-audio/bcm2835-ctl.c | 18 +++---- - .../vc04_services/bcm2835-audio/bcm2835-pcm.c | 33 ++----------- - .../bcm2835-audio/bcm2835-vchiq.c | 47 ++++--------------- - .../vc04_services/bcm2835-audio/bcm2835.c | 1 + - 4 files changed, 20 insertions(+), 79 deletions(-) - ---- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c -+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c -@@ -77,8 +77,7 @@ static int snd_bcm2835_ctl_get(struct sn - { - struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - BUG_ON(!chip && !(chip->avail_substreams & AVAIL_SUBSTREAMS_MASK)); - -@@ -99,8 +98,7 @@ static int snd_bcm2835_ctl_put(struct sn - struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); - int changed = 0; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) { - audio_info("Volume change attempted.. volume = %d new_volume = %d\n", chip->volume, (int)ucontrol->value.integer.value[0]); -@@ -187,8 +185,7 @@ static int snd_bcm2835_spdif_default_get - struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); - int i; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - for (i = 0; i < 4; i++) - ucontrol->value.iec958.status[i] = -@@ -205,8 +202,7 @@ static int snd_bcm2835_spdif_default_put - unsigned int val = 0; - int i, change; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - for (i = 0; i < 4; i++) - val |= (unsigned int)ucontrol->value.iec958.status[i] << (i * 8); -@@ -251,8 +247,7 @@ static int snd_bcm2835_spdif_stream_get( - struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); - int i; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - for (i = 0; i < 4; i++) - ucontrol->value.iec958.status[i] = -@@ -269,8 +264,7 @@ static int snd_bcm2835_spdif_stream_put( - unsigned int val = 0; - int i, change; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - for (i = 0; i < 4; i++) - val |= (unsigned int)ucontrol->value.iec958.status[i] << (i * 8); ---- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c -+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c -@@ -99,10 +99,7 @@ static int snd_bcm2835_playback_open_gen - int idx; - int err; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) { -- audio_error("Interrupted whilst waiting for lock\n"); -- return -EINTR; -- } -+ mutex_lock(&chip->audio_mutex); - audio_info("Alsa open (%d)\n", substream->number); - idx = substream->number; - -@@ -194,10 +191,7 @@ static int snd_bcm2835_playback_close(st - struct bcm2835_alsa_stream *alsa_stream; - - chip = snd_pcm_substream_chip(substream); -- if (mutex_lock_interruptible(&chip->audio_mutex)) { -- audio_error("Interrupted whilst waiting for lock\n"); -- return -EINTR; -- } -+ mutex_lock(&chip->audio_mutex); - runtime = substream->runtime; - alsa_stream = runtime->private_data; - -@@ -274,8 +268,7 @@ static int snd_bcm2835_pcm_prepare(struc - int channels; - int err; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) -- return -EINTR; -+ mutex_lock(&chip->audio_mutex); - - /* notify the vchiq that it should enter spdif passthrough mode by - * setting channels=0 (see -@@ -449,14 +442,9 @@ int snd_bcm2835_new_pcm(struct bcm2835_c - struct snd_pcm *pcm; - int err; - -- mutex_init(&chip->audio_mutex); -- if (mutex_lock_interruptible(&chip->audio_mutex)) { -- audio_error("Interrupted whilst waiting for lock\n"); -- return -EINTR; -- } - err = snd_pcm_new(chip->card, "bcm2835 ALSA", 0, numchannels, 0, &pcm); - if (err < 0) -- goto out; -+ return err; - pcm->private_data = chip; - strcpy(pcm->name, "bcm2835 ALSA"); - chip->pcm = pcm; -@@ -474,9 +462,6 @@ int snd_bcm2835_new_pcm(struct bcm2835_c - snd_bcm2835_playback_hw.buffer_bytes_max, - snd_bcm2835_playback_hw.buffer_bytes_max); - --out: -- mutex_unlock(&chip->audio_mutex); -- - return 0; - } - -@@ -485,13 +470,9 @@ int snd_bcm2835_new_spdif_pcm(struct bcm - struct snd_pcm *pcm; - int err; - -- if (mutex_lock_interruptible(&chip->audio_mutex)) { -- audio_error("Interrupted whilst waiting for lock\n"); -- return -EINTR; -- } - err = snd_pcm_new(chip->card, "bcm2835 ALSA", 1, 1, 0, &pcm); - if (err < 0) -- goto out; -+ return err; - - pcm->private_data = chip; - strcpy(pcm->name, "bcm2835 IEC958/HDMI"); -@@ -504,8 +485,6 @@ int snd_bcm2835_new_spdif_pcm(struct bcm - snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, - snd_dma_continuous_data(GFP_KERNEL), - snd_bcm2835_playback_spdif_hw.buffer_bytes_max, snd_bcm2835_playback_spdif_hw.buffer_bytes_max); --out: -- mutex_unlock(&chip->audio_mutex); - - return 0; - } -@@ -518,8 +497,6 @@ int snd_bcm2835_new_simple_pcm(struct bc - struct snd_pcm *pcm; - int err; - -- mutex_init(&chip->audio_mutex); -- - err = snd_pcm_new(chip->card, name, 0, numchannels, - 0, &pcm); - if (err) ---- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c -+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c -@@ -319,11 +319,7 @@ static int vc_vchi_audio_deinit(struct b - } - - LOG_DBG(" .. about to lock (%d)\n", instance->num_connections); -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - - /* Close all VCHI service connections */ - for (i = 0; i < instance->num_connections; i++) { -@@ -434,11 +430,7 @@ int bcm2835_audio_open(struct bcm2835_al - instance = alsa_stream->instance; - LOG_DBG(" instance (%p)\n", instance); - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", instance->num_connections); -- ret = -EINTR; -- goto free_wq; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - m.type = VC_AUDIO_MSG_TYPE_OPEN; -@@ -479,11 +471,7 @@ static int bcm2835_audio_set_ctls_chan(s - LOG_INFO(" Setting ALSA dest(%d), volume(%d)\n", - chip->dest, chip->volume); - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - instance->result = -1; -@@ -569,10 +557,7 @@ int bcm2835_audio_set_params(struct bcm2 - return -EINVAL; - } - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - instance->result = -1; -@@ -629,11 +614,7 @@ static int bcm2835_audio_start_worker(st - int status; - int ret; - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - m.type = VC_AUDIO_MSG_TYPE_START; -@@ -665,11 +646,7 @@ static int bcm2835_audio_stop_worker(str - int status; - int ret; - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - m.type = VC_AUDIO_MSG_TYPE_STOP; -@@ -704,11 +681,7 @@ int bcm2835_audio_close(struct bcm2835_a - - my_workqueue_quit(alsa_stream); - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - m.type = VC_AUDIO_MSG_TYPE_CLOSE; -@@ -761,11 +734,7 @@ static int bcm2835_audio_write_worker(st - - LOG_INFO(" Writing %d bytes from %p\n", count, src); - -- if (mutex_lock_interruptible(&instance->vchi_mutex)) { -- LOG_DBG("Interrupted whilst waiting for lock on (%d)\n", -- instance->num_connections); -- return -EINTR; -- } -+ mutex_lock(&instance->vchi_mutex); - vchi_service_use(instance->vchi_handle[0]); - - if (instance->peer_version == 0 && ---- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c -+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c -@@ -149,6 +149,7 @@ static int snd_bcm2835_create(struct snd - return -ENOMEM; - - chip->card = card; -+ mutex_init(&chip->audio_mutex); - - chip->vchi_ctx = devres_find(card->dev->parent, - bcm2835_devm_free_vchi_ctx, NULL, NULL); |