From a931b9ce93841a5b66b709ba5a244276e345e63b Mon Sep 17 00:00:00 2001 From: Guneshwor Singh Date: Thu, 14 Sep 2017 17:49:40 +0530 Subject: ALSA: compress: Remove unused variable Commit 04c5d5a430fc ("ALSA: compress: Embed struct device") removed the statement that used 'str' but didn't remove the variable itself. So remove it. [Adding stable to Cc since pr_debug() may refer to the uninitialized buffer -- tiwai] Fixes: 04c5d5a430fc ("ALSA: compress: Embed struct device") Signed-off-by: Guneshwor Singh Cc: Signed-off-by: Takashi Iwai --- sound/core/compress_offload.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'sound/core') diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index fec1dfdb14ad..4490a699030b 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -948,14 +948,13 @@ static const struct file_operations snd_compr_file_ops = { static int snd_compress_dev_register(struct snd_device *device) { int ret = -EINVAL; - char str[16]; struct snd_compr *compr; if (snd_BUG_ON(!device || !device->device_data)) return -EBADFD; compr = device->device_data; - pr_debug("reg %s for device %s, direction %d\n", str, compr->name, + pr_debug("reg device %s, direction %d\n", compr->name, compr->direction); /* register compressed device */ ret = snd_register_device(SNDRV_DEVICE_TYPE_COMPRESS, -- cgit From c9adcdbc653b52e4be834f535eefec833f9ca6b1 Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Thu, 21 Sep 2017 14:03:29 +0800 Subject: ALSA: pcm: Fix structure definition for X32 ABI X32 ABI uses the 64bit timespec in addition to 64bit alignment of 64bit values. We have added compat ABI for these ioctls, but this patch adds one missing padding into 'struct snd_pcm_mmap_status_x32' to fix incompatibilities. Signed-off-by: Baolin Wang Signed-off-by: Takashi Iwai --- sound/core/pcm_compat.c | 1 + 1 file changed, 1 insertion(+) (limited to 'sound/core') diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c index 3a1cc7b97e46..b719d0bd833e 100644 --- a/sound/core/pcm_compat.c +++ b/sound/core/pcm_compat.c @@ -547,6 +547,7 @@ struct snd_pcm_mmap_status_x32 { u32 pad2; /* alignment */ struct timespec tstamp; s32 suspended_state; + s32 pad3; struct timespec audio_tstamp; } __packed; -- cgit From 5803b023881857db32ffefa0d269c90280a67ee0 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 9 Oct 2017 10:02:56 +0200 Subject: ALSA: seq: Fix copy_from_user() call inside lock The event handler in the virmidi sequencer code takes a read-lock for the linked list traverse, while it's calling snd_seq_dump_var_event() in the loop. The latter function may expand the user-space data depending on the event type. It eventually invokes copy_from_user(), which might be a potential dead-lock. The sequencer core guarantees that the user-space data is passed only with atomic=0 argument, but snd_virmidi_dev_receive_event() ignores it and always takes read-lock(). For avoiding the problem above, this patch introduces rwsem for non-atomic case, while keeping rwlock for atomic case. Also while we're at it: the superfluous irq flags is dropped in snd_virmidi_input_open(). Reported-by: Jia-Ju Bai Cc: Signed-off-by: Takashi Iwai --- include/sound/seq_virmidi.h | 1 + sound/core/seq/seq_virmidi.c | 27 +++++++++++++++++++-------- 2 files changed, 20 insertions(+), 8 deletions(-) (limited to 'sound/core') diff --git a/include/sound/seq_virmidi.h b/include/sound/seq_virmidi.h index a03acd0d398a..695257ae64ac 100644 --- a/include/sound/seq_virmidi.h +++ b/include/sound/seq_virmidi.h @@ -60,6 +60,7 @@ struct snd_virmidi_dev { int port; /* created/attached port */ unsigned int flags; /* SNDRV_VIRMIDI_* */ rwlock_t filelist_lock; + struct rw_semaphore filelist_sem; struct list_head filelist; }; diff --git a/sound/core/seq/seq_virmidi.c b/sound/core/seq/seq_virmidi.c index 8d93a4021c78..f48a4cd24ffc 100644 --- a/sound/core/seq/seq_virmidi.c +++ b/sound/core/seq/seq_virmidi.c @@ -77,13 +77,17 @@ static void snd_virmidi_init_event(struct snd_virmidi *vmidi, * decode input event and put to read buffer of each opened file */ static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, - struct snd_seq_event *ev) + struct snd_seq_event *ev, + bool atomic) { struct snd_virmidi *vmidi; unsigned char msg[4]; int len; - read_lock(&rdev->filelist_lock); + if (atomic) + read_lock(&rdev->filelist_lock); + else + down_read(&rdev->filelist_sem); list_for_each_entry(vmidi, &rdev->filelist, list) { if (!vmidi->trigger) continue; @@ -97,7 +101,10 @@ static int snd_virmidi_dev_receive_event(struct snd_virmidi_dev *rdev, snd_rawmidi_receive(vmidi->substream, msg, len); } } - read_unlock(&rdev->filelist_lock); + if (atomic) + read_unlock(&rdev->filelist_lock); + else + up_read(&rdev->filelist_sem); return 0; } @@ -115,7 +122,7 @@ int snd_virmidi_receive(struct snd_rawmidi *rmidi, struct snd_seq_event *ev) struct snd_virmidi_dev *rdev; rdev = rmidi->private_data; - return snd_virmidi_dev_receive_event(rdev, ev); + return snd_virmidi_dev_receive_event(rdev, ev, true); } #endif /* 0 */ @@ -130,7 +137,7 @@ static int snd_virmidi_event_input(struct snd_seq_event *ev, int direct, rdev = private_data; if (!(rdev->flags & SNDRV_VIRMIDI_USE)) return 0; /* ignored */ - return snd_virmidi_dev_receive_event(rdev, ev); + return snd_virmidi_dev_receive_event(rdev, ev, atomic); } /* @@ -209,7 +216,6 @@ static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) struct snd_virmidi_dev *rdev = substream->rmidi->private_data; struct snd_rawmidi_runtime *runtime = substream->runtime; struct snd_virmidi *vmidi; - unsigned long flags; vmidi = kzalloc(sizeof(*vmidi), GFP_KERNEL); if (vmidi == NULL) @@ -223,9 +229,11 @@ static int snd_virmidi_input_open(struct snd_rawmidi_substream *substream) vmidi->client = rdev->client; vmidi->port = rdev->port; runtime->private_data = vmidi; - write_lock_irqsave(&rdev->filelist_lock, flags); + down_write(&rdev->filelist_sem); + write_lock_irq(&rdev->filelist_lock); list_add_tail(&vmidi->list, &rdev->filelist); - write_unlock_irqrestore(&rdev->filelist_lock, flags); + write_unlock_irq(&rdev->filelist_lock); + up_write(&rdev->filelist_sem); vmidi->rdev = rdev; return 0; } @@ -264,9 +272,11 @@ static int snd_virmidi_input_close(struct snd_rawmidi_substream *substream) struct snd_virmidi_dev *rdev = substream->rmidi->private_data; struct snd_virmidi *vmidi = substream->runtime->private_data; + down_write(&rdev->filelist_sem); write_lock_irq(&rdev->filelist_lock); list_del(&vmidi->list); write_unlock_irq(&rdev->filelist_lock); + up_write(&rdev->filelist_sem); snd_midi_event_free(vmidi->parser); substream->runtime->private_data = NULL; kfree(vmidi); @@ -520,6 +530,7 @@ int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmi rdev->rmidi = rmidi; rdev->device = device; rdev->client = -1; + init_rwsem(&rdev->filelist_sem); rwlock_init(&rdev->filelist_lock); INIT_LIST_HEAD(&rdev->filelist); rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH; -- cgit From 71105998845fb012937332fe2e806d443c09e026 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 9 Oct 2017 11:09:20 +0200 Subject: ALSA: seq: Fix use-after-free at creating a port There is a potential race window opened at creating and deleting a port via ioctl, as spotted by fuzzing. snd_seq_create_port() creates a port object and returns its pointer, but it doesn't take the refcount, thus it can be deleted immediately by another thread. Meanwhile, snd_seq_ioctl_create_port() still calls the function snd_seq_system_client_ev_port_start() with the created port object that is being deleted, and this triggers use-after-free like: BUG: KASAN: use-after-free in snd_seq_ioctl_create_port+0x504/0x630 [snd_seq] at addr ffff8801f2241cb1 ============================================================================= BUG kmalloc-512 (Tainted: G B ): kasan: bad access detected ----------------------------------------------------------------------------- INFO: Allocated in snd_seq_create_port+0x94/0x9b0 [snd_seq] age=1 cpu=3 pid=4511 ___slab_alloc+0x425/0x460 __slab_alloc+0x20/0x40 kmem_cache_alloc_trace+0x150/0x190 snd_seq_create_port+0x94/0x9b0 [snd_seq] snd_seq_ioctl_create_port+0xd1/0x630 [snd_seq] snd_seq_do_ioctl+0x11c/0x190 [snd_seq] snd_seq_ioctl+0x40/0x80 [snd_seq] do_vfs_ioctl+0x54b/0xda0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x16/0x75 INFO: Freed in port_delete+0x136/0x1a0 [snd_seq] age=1 cpu=2 pid=4717 __slab_free+0x204/0x310 kfree+0x15f/0x180 port_delete+0x136/0x1a0 [snd_seq] snd_seq_delete_port+0x235/0x350 [snd_seq] snd_seq_ioctl_delete_port+0xc8/0x180 [snd_seq] snd_seq_do_ioctl+0x11c/0x190 [snd_seq] snd_seq_ioctl+0x40/0x80 [snd_seq] do_vfs_ioctl+0x54b/0xda0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x16/0x75 Call Trace: [] dump_stack+0x63/0x82 [] print_trailer+0xfb/0x160 [] object_err+0x34/0x40 [] kasan_report.part.2+0x223/0x520 [] ? snd_seq_ioctl_create_port+0x504/0x630 [snd_seq] [] __asan_report_load1_noabort+0x2e/0x30 [] snd_seq_ioctl_create_port+0x504/0x630 [snd_seq] [] ? snd_seq_ioctl_delete_port+0x180/0x180 [snd_seq] [] ? taskstats_exit+0xbc0/0xbc0 [] snd_seq_do_ioctl+0x11c/0x190 [snd_seq] [] snd_seq_ioctl+0x40/0x80 [snd_seq] [] ? acct_account_cputime+0x63/0x80 [] do_vfs_ioctl+0x54b/0xda0 ..... We may fix this in a few different ways, and in this patch, it's fixed simply by taking the refcount properly at snd_seq_create_port() and letting the caller unref the object after use. Also, there is another potential use-after-free by sprintf() call in snd_seq_create_port(), and this is moved inside the lock. This fix covers CVE-2017-15265. Reported-and-tested-by: Michael23 Yu Suggested-by: Linus Torvalds Cc: Signed-off-by: Takashi Iwai --- sound/core/seq/seq_clientmgr.c | 6 +++++- sound/core/seq/seq_ports.c | 7 +++++-- 2 files changed, 10 insertions(+), 3 deletions(-) (limited to 'sound/core') diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index ea2d0ae85bd3..6c9cba2166d9 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1259,6 +1259,7 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) struct snd_seq_port_info *info = arg; struct snd_seq_client_port *port; struct snd_seq_port_callback *callback; + int port_idx; /* it is not allowed to create the port for an another client */ if (info->addr.client != client->number) @@ -1269,7 +1270,9 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) return -ENOMEM; if (client->type == USER_CLIENT && info->kernel) { - snd_seq_delete_port(client, port->addr.port); + port_idx = port->addr.port; + snd_seq_port_unlock(port); + snd_seq_delete_port(client, port_idx); return -EINVAL; } if (client->type == KERNEL_CLIENT) { @@ -1290,6 +1293,7 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) snd_seq_set_port_info(port, info); snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port); + snd_seq_port_unlock(port); return 0; } diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c index 0a7020c82bfc..d21ece9f8d73 100644 --- a/sound/core/seq/seq_ports.c +++ b/sound/core/seq/seq_ports.c @@ -122,7 +122,9 @@ static void port_subs_info_init(struct snd_seq_port_subs_info *grp) } -/* create a port, port number is returned (-1 on failure) */ +/* create a port, port number is returned (-1 on failure); + * the caller needs to unref the port via snd_seq_port_unlock() appropriately + */ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, int port) { @@ -151,6 +153,7 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, snd_use_lock_init(&new_port->use_lock); port_subs_info_init(&new_port->c_src); port_subs_info_init(&new_port->c_dest); + snd_use_lock_use(&new_port->use_lock); num = port >= 0 ? port : 0; mutex_lock(&client->ports_mutex); @@ -165,9 +168,9 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, list_add_tail(&new_port->list, &p->list); client->num_ports++; new_port->addr.port = num; /* store the port number in the port */ + sprintf(new_port->name, "port-%d", num); write_unlock_irqrestore(&client->ports_lock, flags); mutex_unlock(&client->ports_mutex); - sprintf(new_port->name, "port-%d", num); return new_port; } -- cgit From 8009d506a1dd00cf436b0c4cca0dcec130580a21 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Wed, 18 Oct 2017 00:45:49 +0100 Subject: ALSA: seq: Enable 'use' locking in all configurations The 'use' locking macros are no-ops if neither SMP or SND_DEBUG is enabled. This might once have been OK in non-preemptible configurations, but even in that case snd_seq_read() may sleep while relying on a 'use' lock. So always use the proper implementations. Cc: stable@vger.kernel.org Signed-off-by: Ben Hutchings Signed-off-by: Takashi Iwai --- sound/core/seq/seq_lock.c | 4 ---- sound/core/seq/seq_lock.h | 12 ------------ 2 files changed, 16 deletions(-) (limited to 'sound/core') diff --git a/sound/core/seq/seq_lock.c b/sound/core/seq/seq_lock.c index 0ff7926a5a69..cda64b489e42 100644 --- a/sound/core/seq/seq_lock.c +++ b/sound/core/seq/seq_lock.c @@ -23,8 +23,6 @@ #include #include "seq_lock.h" -#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG) - /* wait until all locks are released */ void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line) { @@ -41,5 +39,3 @@ void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line) } } EXPORT_SYMBOL(snd_use_lock_sync_helper); - -#endif diff --git a/sound/core/seq/seq_lock.h b/sound/core/seq/seq_lock.h index 54044bc2c9ef..ac38031c370e 100644 --- a/sound/core/seq/seq_lock.h +++ b/sound/core/seq/seq_lock.h @@ -3,8 +3,6 @@ #include -#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG) - typedef atomic_t snd_use_lock_t; /* initialize lock */ @@ -20,14 +18,4 @@ typedef atomic_t snd_use_lock_t; void snd_use_lock_sync_helper(snd_use_lock_t *lock, const char *file, int line); #define snd_use_lock_sync(lockp) snd_use_lock_sync_helper(lockp, __BASE_FILE__, __LINE__) -#else /* SMP || CONFIG_SND_DEBUG */ - -typedef spinlock_t snd_use_lock_t; /* dummy */ -#define snd_use_lock_init(lockp) /**/ -#define snd_use_lock_use(lockp) /**/ -#define snd_use_lock_free(lockp) /**/ -#define snd_use_lock_sync(lockp) /**/ - -#endif /* SMP || CONFIG_SND_DEBUG */ - #endif /* __SND_SEQ_LOCK_H */ -- cgit From a91d66129fb9bcead12af3ed2008d6ddbf179509 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 16 Oct 2017 11:39:28 +0200 Subject: ALSA: hda - Fix incorrect TLV callback check introduced during set_fs() removal The commit 99b5c5bb9a54 ("ALSA: hda - Remove the use of set_fs()") converted the get_kctl_0dB_offset() call for killing set_fs() usage in HD-audio codec code. The conversion assumed that the TLV callback used in HD-audio code is only snd_hda_mixer_amp() and applies the TLV calculation locally. Although this assumption is correct, and all slave kctls are actually with that callback, the current code is still utterly buggy; it doesn't hit this condition and falls back to the next check. It's because the function gets called after adding slave kctls to vmaster. By assigning a slave kctl, the slave kctl object is faked inside vmaster code, and the whole kctl ops are overridden. Thus the callback op points to a different value from what we've assumed. More badly, as reported by the KERNEXEC and UDEREF features of PaX, the code flow turns into the unexpected pitfall. The next fallback check is SNDRV_CTL_ELEM_ACCESS_TLV_READ access bit, and this always hits for each kctl with TLV. Then it evaluates the callback function pointer wrongly as if it were a TLV array. Although currently its side-effect is fairly limited, this incorrect reference may lead to an unpleasant result. For addressing the regression, this patch introduces a new helper to vmaster code, snd_ctl_apply_vmaster_slaves(). This works similarly like the existing map_slaves() in hda_codec.c: it loops over the slave list of the given master, and applies the given function to each slave. Then the initializer function receives the right kctl object and we can compare the correct pointer instead of the faked one. Also, for catching the similar breakage in future, give an error message when the unexpected TLV callback is found and bail out immediately. Fixes: 99b5c5bb9a54 ("ALSA: hda - Remove the use of set_fs()") Reported-by: PaX Team Cc: # v4.13 Signed-off-by: Takashi Iwai --- include/sound/control.h | 3 ++ sound/core/vmaster.c | 31 +++++++++++++++ sound/pci/hda/hda_codec.c | 97 +++++++++++++++++++++++++++-------------------- 3 files changed, 89 insertions(+), 42 deletions(-) (limited to 'sound/core') diff --git a/include/sound/control.h b/include/sound/control.h index bd7246de58e7..a1f1152bc687 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -248,6 +248,9 @@ int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl, void *private_data); void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only); #define snd_ctl_sync_vmaster_hook(kctl) snd_ctl_sync_vmaster(kctl, true) +int snd_ctl_apply_vmaster_slaves(struct snd_kcontrol *kctl, + int (*func)(struct snd_kcontrol *, void *), + void *arg); /* * Helper functions for jack-detection controls diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c index 6c58e6f73a01..e43af18d4383 100644 --- a/sound/core/vmaster.c +++ b/sound/core/vmaster.c @@ -484,3 +484,34 @@ void snd_ctl_sync_vmaster(struct snd_kcontrol *kcontrol, bool hook_only) master->hook(master->hook_private_data, master->val); } EXPORT_SYMBOL_GPL(snd_ctl_sync_vmaster); + +/** + * snd_ctl_apply_vmaster_slaves - Apply function to each vmaster slave + * @kctl: vmaster kctl element + * @func: function to apply + * @arg: optional function argument + * + * Apply the function @func to each slave kctl of the given vmaster kctl. + * Returns 0 if successful, or a negative error code. + */ +int snd_ctl_apply_vmaster_slaves(struct snd_kcontrol *kctl, + int (*func)(struct snd_kcontrol *, void *), + void *arg) +{ + struct link_master *master; + struct link_slave *slave; + int err; + + master = snd_kcontrol_chip(kctl); + err = master_init(master); + if (err < 0) + return err; + list_for_each_entry(slave, &master->slaves, list) { + err = func(&slave->slave, arg); + if (err < 0) + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_ctl_apply_vmaster_slaves); diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index b6cf9684c2ec..a0989d231fd0 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1803,36 +1803,6 @@ static int check_slave_present(struct hda_codec *codec, return 1; } -/* guess the value corresponding to 0dB */ -static int get_kctl_0dB_offset(struct hda_codec *codec, - struct snd_kcontrol *kctl, int *step_to_check) -{ - int _tlv[4]; - const int *tlv = NULL; - int val = -1; - - if ((kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) && - kctl->tlv.c == snd_hda_mixer_amp_tlv) { - get_ctl_amp_tlv(kctl, _tlv); - tlv = _tlv; - } else if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) - tlv = kctl->tlv.p; - if (tlv && tlv[0] == SNDRV_CTL_TLVT_DB_SCALE) { - int step = tlv[3]; - step &= ~TLV_DB_SCALE_MUTE; - if (!step) - return -1; - if (*step_to_check && *step_to_check != step) { - codec_err(codec, "Mismatching dB step for vmaster slave (%d!=%d)\n", - *step_to_check, step); - return -1; - } - *step_to_check = step; - val = -tlv[2] / step; - } - return val; -} - /* call kctl->put with the given value(s) */ static int put_kctl_with_value(struct snd_kcontrol *kctl, int val) { @@ -1847,19 +1817,58 @@ static int put_kctl_with_value(struct snd_kcontrol *kctl, int val) return 0; } -/* initialize the slave volume with 0dB */ -static int init_slave_0dB(struct hda_codec *codec, - void *data, struct snd_kcontrol *slave) +struct slave_init_arg { + struct hda_codec *codec; + int step; +}; + +/* initialize the slave volume with 0dB via snd_ctl_apply_vmaster_slaves() */ +static int init_slave_0dB(struct snd_kcontrol *kctl, void *_arg) { - int offset = get_kctl_0dB_offset(codec, slave, data); - if (offset > 0) - put_kctl_with_value(slave, offset); + struct slave_init_arg *arg = _arg; + int _tlv[4]; + const int *tlv = NULL; + int step; + int val; + + if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) { + if (kctl->tlv.c != snd_hda_mixer_amp_tlv) { + codec_err(arg->codec, + "Unexpected TLV callback for slave %s:%d\n", + kctl->id.name, kctl->id.index); + return 0; /* ignore */ + } + get_ctl_amp_tlv(kctl, _tlv); + tlv = _tlv; + } else if (kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) + tlv = kctl->tlv.p; + + if (!tlv || tlv[0] != SNDRV_CTL_TLVT_DB_SCALE) + return 0; + + step = tlv[3]; + step &= ~TLV_DB_SCALE_MUTE; + if (!step) + return 0; + if (arg->step && arg->step != step) { + codec_err(arg->codec, + "Mismatching dB step for vmaster slave (%d!=%d)\n", + arg->step, step); + return 0; + } + + arg->step = step; + val = -tlv[2] / step; + if (val > 0) { + put_kctl_with_value(kctl, val); + return val; + } + return 0; } -/* unmute the slave */ -static int init_slave_unmute(struct hda_codec *codec, - void *data, struct snd_kcontrol *slave) +/* unmute the slave via snd_ctl_apply_vmaster_slaves() */ +static int init_slave_unmute(struct snd_kcontrol *slave, void *_arg) { return put_kctl_with_value(slave, 1); } @@ -1919,9 +1928,13 @@ int __snd_hda_add_vmaster(struct hda_codec *codec, char *name, /* init with master mute & zero volume */ put_kctl_with_value(kctl, 0); if (init_slave_vol) { - int step = 0; - map_slaves(codec, slaves, suffix, - tlv ? init_slave_0dB : init_slave_unmute, &step); + struct slave_init_arg arg = { + .codec = codec, + .step = 0, + }; + snd_ctl_apply_vmaster_slaves(kctl, + tlv ? init_slave_0dB : init_slave_unmute, + &arg); } if (ctl_ret) -- cgit