From 5e246b850df563224be26f1d409cf66fd6c968df Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 8 Aug 2008 17:12:47 +0200 Subject: ALSA: Kill snd_assert() in other places Kill snd_assert() in other places, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/drivers/dummy.c | 3 ++- sound/drivers/opl3/opl3_lib.c | 6 ++++-- sound/drivers/opl3/opl3_midi.c | 6 ++++-- sound/drivers/opl3/opl3_oss.c | 15 ++++++++++----- sound/drivers/opl3/opl3_synth.c | 3 ++- sound/drivers/opl4/opl4_synth.c | 2 +- sound/drivers/vx/vx_cmd.c | 3 ++- sound/drivers/vx/vx_core.c | 21 ++++++++++++++------- sound/drivers/vx/vx_hwdep.c | 6 ++++-- sound/drivers/vx/vx_mixer.c | 3 ++- sound/drivers/vx/vx_pcm.c | 9 ++++++--- sound/drivers/vx/vx_uer.c | 6 ++++-- 12 files changed, 55 insertions(+), 28 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c index 4e4c69e6cb4c..c873243e6713 100644 --- a/sound/drivers/dummy.c +++ b/sound/drivers/dummy.c @@ -565,7 +565,8 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) unsigned int idx; int err; - snd_assert(dummy != NULL, return -EINVAL); + if (snd_BUG_ON(!dummy)) + return -EINVAL; spin_lock_init(&dummy->mixer_lock); strcpy(card->mixername, "Dummy Mixer"); diff --git a/sound/drivers/opl3/opl3_lib.c b/sound/drivers/opl3/opl3_lib.c index ebe4359047cb..780582340fef 100644 --- a/sound/drivers/opl3/opl3_lib.c +++ b/sound/drivers/opl3/opl3_lib.c @@ -139,7 +139,8 @@ static int snd_opl3_detect(struct snd_opl3 * opl3) * If we had an OPL4 chip, opl3->hardware would have been set * by the OPL4 driver; so we can assume OPL3 here. */ - snd_assert(opl3->r_port != 0, return -ENODEV); + if (snd_BUG_ON(!opl3->r_port)) + return -ENODEV; opl3->hardware = OPL3_HW_OPL3; } return 0; @@ -324,7 +325,8 @@ EXPORT_SYMBOL(snd_opl3_interrupt); static int snd_opl3_free(struct snd_opl3 *opl3) { - snd_assert(opl3 != NULL, return -ENXIO); + if (snd_BUG_ON(!opl3)) + return -ENXIO; if (opl3->private_free) opl3->private_free(opl3); snd_opl3_clear_patches(opl3); diff --git a/sound/drivers/opl3/opl3_midi.c b/sound/drivers/opl3/opl3_midi.c index cebcb8b78acb..16feafa2c51e 100644 --- a/sound/drivers/opl3/opl3_midi.c +++ b/sound/drivers/opl3/opl3_midi.c @@ -617,7 +617,8 @@ static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) struct snd_opl3_voice *vp, *vp2; - snd_assert(voice < MAX_OPL3_VOICES, return); + if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) + return; vp = &opl3->voices[voice]; if (voice < MAX_OPL2_VOICES) { @@ -737,7 +738,8 @@ static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) struct snd_opl3_voice *vp; - snd_assert(voice < MAX_OPL3_VOICES, return); + if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) + return; vp = &opl3->voices[voice]; if (vp->chan == NULL) diff --git a/sound/drivers/opl3/opl3_oss.c b/sound/drivers/opl3/opl3_oss.c index 239347f26154..9a2271dc046a 100644 --- a/sound/drivers/opl3/opl3_oss.c +++ b/sound/drivers/opl3/opl3_oss.c @@ -162,7 +162,8 @@ static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) struct snd_opl3 *opl3 = closure; int err; - snd_assert(arg != NULL, return -ENXIO); + if (snd_BUG_ON(!arg)) + return -ENXIO; if ((err = snd_opl3_synth_setup(opl3)) < 0) return err; @@ -184,7 +185,8 @@ static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) { struct snd_opl3 *opl3; - snd_assert(arg != NULL, return -ENXIO); + if (snd_BUG_ON(!arg)) + return -ENXIO; opl3 = arg->private_data; snd_opl3_synth_cleanup(opl3); @@ -206,7 +208,8 @@ static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, char name[32]; int err, type; - snd_assert(arg != NULL, return -ENXIO); + if (snd_BUG_ON(!arg)) + return -ENXIO; opl3 = arg->private_data; if (format == FM_PATCH) @@ -246,7 +249,8 @@ static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, { struct snd_opl3 *opl3; - snd_assert(arg != NULL, return -ENXIO); + if (snd_BUG_ON(!arg)) + return -ENXIO; opl3 = arg->private_data; switch (cmd) { case SNDCTL_FM_LOAD_INSTR: @@ -271,7 +275,8 @@ static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) { struct snd_opl3 *opl3; - snd_assert(arg != NULL, return -ENXIO); + if (snd_BUG_ON(!arg)) + return -ENXIO; opl3 = arg->private_data; return 0; diff --git a/sound/drivers/opl3/opl3_synth.c b/sound/drivers/opl3/opl3_synth.c index fb64c890109b..962bb9c8b9c8 100644 --- a/sound/drivers/opl3/opl3_synth.c +++ b/sound/drivers/opl3/opl3_synth.c @@ -92,7 +92,8 @@ int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file, struct snd_opl3 *opl3 = hw->private_data; void __user *argp = (void __user *)arg; - snd_assert(opl3 != NULL, return -EINVAL); + if (snd_BUG_ON(!opl3)) + return -EINVAL; switch (cmd) { /* get information */ diff --git a/sound/drivers/opl4/opl4_synth.c b/sound/drivers/opl4/opl4_synth.c index 74f6e53eae0d..49b9e240915c 100644 --- a/sound/drivers/opl4/opl4_synth.c +++ b/sound/drivers/opl4/opl4_synth.c @@ -467,7 +467,7 @@ static struct opl4_voice *snd_opl4_get_voice(struct snd_opl4 *opl4) if (!list_empty(&opl4->off_voices)) return list_entry(opl4->off_voices.next, struct opl4_voice, list); /* then get the oldest key-on voice */ - snd_assert(!list_empty(&opl4->on_voices), ); + snd_BUG_ON(list_empty(&opl4->on_voices)); return list_entry(opl4->on_voices.next, struct opl4_voice, list); } diff --git a/sound/drivers/vx/vx_cmd.c b/sound/drivers/vx/vx_cmd.c index 9529e3bf2866..23f4857f02c8 100644 --- a/sound/drivers/vx/vx_cmd.c +++ b/sound/drivers/vx/vx_cmd.c @@ -99,7 +99,8 @@ static struct vx_cmd_info vx_dsp_cmds[] = { */ void vx_init_rmh(struct vx_rmh *rmh, unsigned int cmd) { - snd_assert(cmd < CMD_LAST_INDEX, return); + if (snd_BUG_ON(cmd >= CMD_LAST_INDEX)) + return; rmh->LgCmd = vx_dsp_cmds[cmd].length; rmh->LgStat = vx_dsp_cmds[cmd].st_length; rmh->DspStat = vx_dsp_cmds[cmd].st_type; diff --git a/sound/drivers/vx/vx_core.c b/sound/drivers/vx/vx_core.c index 585af2eb1438..473b07f6ae85 100644 --- a/sound/drivers/vx/vx_core.c +++ b/sound/drivers/vx/vx_core.c @@ -205,7 +205,8 @@ static int vx_read_status(struct vx_core *chip, struct vx_rmh *rmh) if (size < 1) return 0; - snd_assert(size <= SIZE_MAX_STATUS, return -EINVAL); + if (snd_BUG_ON(size > SIZE_MAX_STATUS)) + return -EINVAL; for (i = 1; i <= size; i++) { /* trigger an irq MESS_WRITE_NEXT */ @@ -425,13 +426,16 @@ int snd_vx_load_boot_image(struct vx_core *chip, const struct firmware *boot) int no_fillup = vx_has_new_dsp(chip); /* check the length of boot image */ - snd_assert(boot->size > 0, return -EINVAL); - snd_assert(boot->size % 3 == 0, return -EINVAL); + if (boot->size <= 0) + return -EINVAL; + if (boot->size % 3) + return -EINVAL; #if 0 { /* more strict check */ unsigned int c = ((u32)boot->data[0] << 16) | ((u32)boot->data[1] << 8) | boot->data[2]; - snd_assert(boot->size == (c + 2) * 3, return -EINVAL); + if (boot->size != (c + 2) * 3) + return -EINVAL; } #endif @@ -554,7 +558,8 @@ EXPORT_SYMBOL(snd_vx_irq_handler); */ static void vx_reset_board(struct vx_core *chip, int cold_reset) { - snd_assert(chip->ops->reset_board, return); + if (snd_BUG_ON(!chip->ops->reset_board)) + return; /* current source, later sync'ed with target */ chip->audio_source = VX_AUDIO_SRC_LINE; @@ -673,7 +678,8 @@ int snd_vx_dsp_load(struct vx_core *chip, const struct firmware *dsp) unsigned int csum = 0; const unsigned char *image, *cptr; - snd_assert(dsp->size % 3 == 0, return -EINVAL); + if (dsp->size % 3) + return -EINVAL; vx_toggle_dac_mute(chip, 1); @@ -775,7 +781,8 @@ struct vx_core *snd_vx_create(struct snd_card *card, struct snd_vx_hardware *hw, { struct vx_core *chip; - snd_assert(card && hw && ops, return NULL); + if (snd_BUG_ON(!card || !hw || !ops)) + return NULL; chip = kzalloc(sizeof(*chip) + extra_size, GFP_KERNEL); if (! chip) { diff --git a/sound/drivers/vx/vx_hwdep.c b/sound/drivers/vx/vx_hwdep.c index efd22e92bced..8d6362e2d4c9 100644 --- a/sound/drivers/vx/vx_hwdep.c +++ b/sound/drivers/vx/vx_hwdep.c @@ -141,7 +141,8 @@ static int vx_hwdep_dsp_status(struct snd_hwdep *hw, }; struct vx_core *vx = hw->private_data; - snd_assert(type_ids[vx->type], return -EINVAL); + if (snd_BUG_ON(!type_ids[vx->type])) + return -EINVAL; strcpy(info->id, type_ids[vx->type]); if (vx_is_pcmcia(vx)) info->num_dsps = 4; @@ -168,7 +169,8 @@ static int vx_hwdep_dsp_load(struct snd_hwdep *hw, int index, err; struct firmware *fw; - snd_assert(vx->ops->load_dsp, return -ENXIO); + if (snd_BUG_ON(!vx->ops->load_dsp)) + return -ENXIO; fw = kmalloc(sizeof(*fw), GFP_KERNEL); if (! fw) { diff --git a/sound/drivers/vx/vx_mixer.c b/sound/drivers/vx/vx_mixer.c index 5a347321f8c0..c71b8d148d7f 100644 --- a/sound/drivers/vx/vx_mixer.c +++ b/sound/drivers/vx/vx_mixer.c @@ -34,7 +34,8 @@ static void vx_write_codec_reg(struct vx_core *chip, int codec, unsigned int dat { unsigned long flags; - snd_assert(chip->ops->write_codec, return); + if (snd_BUG_ON(!chip->ops->write_codec)) + return; if (chip->chip_status & VX_STAT_IS_STALE) return; diff --git a/sound/drivers/vx/vx_pcm.c b/sound/drivers/vx/vx_pcm.c index fdbf86571b1f..27de574c08f7 100644 --- a/sound/drivers/vx/vx_pcm.c +++ b/sound/drivers/vx/vx_pcm.c @@ -587,7 +587,8 @@ static int vx_pcm_playback_open(struct snd_pcm_substream *subs) return -EBUSY; audio = subs->pcm->device * 2; - snd_assert(audio < chip->audio_outs, return -EINVAL); + if (snd_BUG_ON(audio >= chip->audio_outs)) + return -EINVAL; /* playback pipe may have been already allocated for monitoring */ pipe = chip->playback_pipes[audio]; @@ -996,7 +997,8 @@ static int vx_pcm_capture_open(struct snd_pcm_substream *subs) return -EBUSY; audio = subs->pcm->device * 2; - snd_assert(audio < chip->audio_ins, return -EINVAL); + if (snd_BUG_ON(audio >= chip->audio_ins)) + return -EINVAL; err = vx_alloc_pipe(chip, 1, audio, 2, &pipe); if (err < 0) return err; @@ -1214,7 +1216,8 @@ void vx_pcm_update_intr(struct vx_core *chip, unsigned int events) } if (capture) continue; - snd_assert(p >= 0 && (unsigned int)p < chip->audio_outs,); + if (snd_BUG_ON(p < 0 || p >= chip->audio_outs)) + continue; pipe = chip->playback_pipes[p]; if (pipe && pipe->substream) { vx_pcm_playback_update(chip, pipe->substream, pipe); diff --git a/sound/drivers/vx/vx_uer.c b/sound/drivers/vx/vx_uer.c index fb8932af888d..0e1ba9b47904 100644 --- a/sound/drivers/vx/vx_uer.c +++ b/sound/drivers/vx/vx_uer.c @@ -163,13 +163,15 @@ static int vx_calc_clock_from_freq(struct vx_core *chip, int freq) { int hexfreq; - snd_assert(freq > 0, return 0); + if (snd_BUG_ON(freq <= 0)) + return 0; hexfreq = (28224000 * 10) / freq; hexfreq = (hexfreq + 5) / 10; /* max freq = 55125 Hz */ - snd_assert(hexfreq > 0x00000200, return 0); + if (snd_BUG_ON(hexfreq <= 0x00000200)) + return 0; if (hexfreq <= 0x03ff) return hexfreq - 0x00000201; -- cgit v1.2.3 From 54e8e21ed21ca8788aa75294067494abebf9d550 Mon Sep 17 00:00:00 2001 From: Daniel THOMPSON Date: Fri, 15 Aug 2008 10:53:38 +0100 Subject: sound: Fix esoteric double free in the dummy sound driver. The dummy driver uses runtime->private_free but still frees its pcm structures on error paths. This is esoteric because the error paths in question are unreachable. Thus the bug is only a problem when someone copies this code into other drivers. Signed-off-by: Daniel R Thompson Signed-off-by: Jaroslav Kysela --- sound/drivers/dummy.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c index c873243e6713..4f900d8b92ce 100644 --- a/sound/drivers/dummy.c +++ b/sound/drivers/dummy.c @@ -354,6 +354,7 @@ static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream) if ((dpcm = new_pcm_stream(substream)) == NULL) return -ENOMEM; runtime->private_data = dpcm; + /* makes the infrastructure responsible for freeing dpcm */ runtime->private_free = snd_card_dummy_runtime_free; runtime->hw = snd_card_dummy_playback; if (substream->pcm->device & 1) { @@ -362,10 +363,8 @@ static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream) } if (substream->pcm->device & 2) runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); - if ((err = add_playback_constraints(runtime)) < 0) { - kfree(dpcm); + if ((err = add_playback_constraints(runtime)) < 0) return err; - } return 0; } @@ -379,6 +378,7 @@ static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) if ((dpcm = new_pcm_stream(substream)) == NULL) return -ENOMEM; runtime->private_data = dpcm; + /* makes the infrastructure responsible for freeing dpcm */ runtime->private_free = snd_card_dummy_runtime_free; runtime->hw = snd_card_dummy_capture; if (substream->pcm->device == 1) { @@ -387,10 +387,8 @@ static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) } if (substream->pcm->device & 2) runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); - if ((err = add_capture_constraints(runtime)) < 0) { - kfree(dpcm); + if ((err = add_capture_constraints(runtime)) < 0) return err; - } return 0; } -- cgit v1.2.3 From 1a11cb6427e65b7cfc9c3ec6eaecd2dba1f2d69a Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Fri, 15 Aug 2008 12:59:02 +0200 Subject: ALSA: dummy driver - do not use assignment in if condition checkpatch.pl does not like assignment in if condition Signed-off-by: Jaroslav Kysela --- sound/drivers/dummy.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c index 4f900d8b92ce..e5e749f3e0ef 100644 --- a/sound/drivers/dummy.c +++ b/sound/drivers/dummy.c @@ -47,9 +47,11 @@ MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) { int err; - if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) + err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) return err; - if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) + err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX); + if (err) < 0) return err; return 0; } @@ -363,7 +365,8 @@ static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream) } if (substream->pcm->device & 2) runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); - if ((err = add_playback_constraints(runtime)) < 0) + err = add_playback_constraints(runtime); + if (err < 0) return err; return 0; @@ -387,7 +390,8 @@ static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) } if (substream->pcm->device & 2) runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); - if ((err = add_capture_constraints(runtime)) < 0) + err = add_capture_constraints(runtime); + if (err < 0) return err; return 0; @@ -431,8 +435,9 @@ static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, struct snd_pcm *pcm; int err; - if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, - substreams, substreams, &pcm)) < 0) + err = snd_pcm_new(dummy->card, "Dummy PCM", device, + substreams, substreams, &pcm); + if (err < 0) return err; dummy->pcm = pcm; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); @@ -569,7 +574,8 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy) strcpy(card->mixername, "Dummy Mixer"); for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { - if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) + err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy)); + if (err < 0) return err; } return 0; @@ -593,10 +599,12 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr) pcm_substreams[dev] = 1; if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; - if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0) + err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]); + if (err < 0) goto __nodev; } - if ((err = snd_card_dummy_new_mixer(dummy)) < 0) + err = snd_card_dummy_new_mixer(dummy); + if (err < 0) goto __nodev; strcpy(card->driver, "Dummy"); strcpy(card->shortname, "Dummy"); @@ -604,7 +612,8 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr) snd_card_set_dev(card, &devptr->dev); - if ((err = snd_card_register(card)) == 0) { + err = snd_card_register(card); + if (err == 0) { platform_set_drvdata(devptr, card); return 0; } @@ -667,7 +676,8 @@ static int __init alsa_card_dummy_init(void) { int i, cards, err; - if ((err = platform_driver_register(&snd_dummy_driver)) < 0) + err = platform_driver_register(&snd_dummy_driver); + if (err < 0) return err; cards = 0; -- cgit v1.2.3 From 32fe61426373d85e797bf4f4dcbe4510487c3e00 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 8 Oct 2008 10:28:25 +0200 Subject: ALSA: mtpav - Fix race in probe Ingo reported Oops at probing mtpav driver. It's a race between the irq handler and the rawmidi instance registration. This patch fixes the order of registration to avoid the race. Signed-off-by: Takashi Iwai Tested-by: Ingo Molnar Signed-off-by: Jaroslav Kysela --- sound/drivers/mtpav.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/mtpav.c b/sound/drivers/mtpav.c index b5e1a71bb64b..5b89c0883d60 100644 --- a/sound/drivers/mtpav.c +++ b/sound/drivers/mtpav.c @@ -715,6 +715,10 @@ static int __devinit snd_mtpav_probe(struct platform_device *dev) card->private_free = snd_mtpav_free; + err = snd_mtpav_get_RAWMIDI(mtp_card); + if (err < 0) + goto __error; + err = snd_mtpav_get_ISA(mtp_card); if (err < 0) goto __error; @@ -724,10 +728,6 @@ static int __devinit snd_mtpav_probe(struct platform_device *dev) snprintf(card->longname, sizeof(card->longname), "MTPAV on parallel port at 0x%lx", port); - err = snd_mtpav_get_RAWMIDI(mtp_card); - if (err < 0) - goto __error; - snd_mtpav_portscan(mtp_card); snd_card_set_dev(card, &dev->dev); -- cgit v1.2.3