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authorTakashi Iwai <tiwai@suse.de>2009-06-13 10:12:59 +0200
committerTakashi Iwai <tiwai@suse.de>2009-06-13 10:12:59 +0200
commit635c265f32d8a3f73402813d6a8dd47f2a363df5 (patch)
treef86815481d55d7b844468e4cca92211daea800e2 /sound/pci
parenta5990dc5b96f537618b0f057c8723a6a0b0cdc74 (diff)
ALSA: ctxfi - Replace atc lock to mutex
The spinlock in atc can cause a sleep in lock: Kernel failure message 1: BUG: sleeping function called from invalid context at mm/slub.c:1599 in_atomic(): 0, irqs_disabled(): 1, pid: 2537, name: gstreamer-prope Pid: 2537, comm: gstreamer-prope Tainted: P 2.6.29.4-167.fc11.x86_64 #1 Call Trace: [<ffffffff8103ff0f>] __might_sleep+0x10b/0x110 [<ffffffff810cd734>] __kmalloc+0x73/0x130 [<ffffffffa0b4b142>] ? daio_rsc_init+0xaa/0x125 [snd_ctxfi] [<ffffffffa0b4b212>] dao_rsc_init+0x55/0x1c0 [snd_ctxfi] [<ffffffffa0b4b3d2>] dao_rsc_reinit+0x55/0x5d [snd_ctxfi] [<ffffffff813abd6c>] ? _spin_lock_irqsave+0x32/0x3b [<ffffffffa0b454fe>] atc_spdif_out_passthru+0x92/0x136 [snd_ctxfi] ... Since the lock path is no critical path, it can be gracefully replaced with a mutex. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/ctxfi/ctatc.c22
-rw-r--r--sound/pci/ctxfi/ctatc.h4
2 files changed, 11 insertions, 15 deletions
diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 80fb2baed7a7..b0adc8094009 100644
--- a/sound/pci/ctxfi/ctatc.c
+++ b/sound/pci/ctxfi/ctatc.c
@@ -259,7 +259,6 @@ static int atc_pcm_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
int n_amixer = apcm->substream->runtime->channels, i = 0;
int device = apcm->substream->pcm->device;
unsigned int pitch;
- unsigned long flags;
if (NULL != apcm->src) {
/* Prepared pcm playback */
@@ -311,10 +310,10 @@ static int atc_pcm_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
src = apcm->src;
for (i = 0; i < n_amixer; i++) {
amixer = apcm->amixers[i];
- spin_lock_irqsave(&atc->atc_lock, flags);
+ mutex_lock(&atc->atc_mutex);
amixer->ops->setup(amixer, &src->rsc,
INIT_VOL, atc->pcm[i+device*2]);
- spin_unlock_irqrestore(&atc->atc_lock, flags);
+ mutex_unlock(&atc->atc_mutex);
src = src->ops->next_interleave(src);
if (NULL == src)
src = apcm->src;
@@ -865,7 +864,6 @@ static int
spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
{
struct dao *dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
- unsigned long flags;
unsigned int rate = apcm->substream->runtime->rate;
unsigned int status;
int err;
@@ -885,7 +883,7 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
return -ENOENT;
}
- spin_lock_irqsave(&atc->atc_lock, flags);
+ mutex_lock(&atc->atc_mutex);
dao->ops->get_spos(dao, &status);
if (((status >> 24) & IEC958_AES3_CON_FS) != iec958_con_fs) {
status &= ((~IEC958_AES3_CON_FS) << 24);
@@ -895,7 +893,7 @@ spdif_passthru_playback_setup(struct ct_atc *atc, struct ct_atc_pcm *apcm)
}
if ((rate != atc->pll_rate) && (32000 != rate))
err = atc_pll_init(atc, rate);
- spin_unlock_irqrestore(&atc->atc_lock, flags);
+ mutex_unlock(&atc->atc_mutex);
return err;
}
@@ -908,7 +906,6 @@ spdif_passthru_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
struct dao *dao;
int err;
int i;
- unsigned long flags;
if (NULL != apcm->src)
return 0;
@@ -934,13 +931,13 @@ spdif_passthru_playback_prepare(struct ct_atc *atc, struct ct_atc_pcm *apcm)
src = apcm->src;
}
/* Connect to SPDIFOO */
- spin_lock_irqsave(&atc->atc_lock, flags);
+ mutex_lock(&atc->atc_mutex);
dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
amixer = apcm->amixers[0];
dao->ops->set_left_input(dao, &amixer->rsc);
amixer = apcm->amixers[1];
dao->ops->set_right_input(dao, &amixer->rsc);
- spin_unlock_irqrestore(&atc->atc_lock, flags);
+ mutex_unlock(&atc->atc_mutex);
ct_timer_prepare(apcm->timer);
@@ -1088,7 +1085,6 @@ static int atc_spdif_out_set_status(struct ct_atc *atc, unsigned int status)
static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
{
- unsigned long flags;
struct dao_desc da_dsc = {0};
struct dao *dao;
int err;
@@ -1096,7 +1092,7 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
struct rsc *rscs[2] = {NULL};
unsigned int spos = 0;
- spin_lock_irqsave(&atc->atc_lock, flags);
+ mutex_lock(&atc->atc_mutex);
dao = container_of(atc->daios[SPDIFOO], struct dao, daio);
da_dsc.msr = state ? 1 : atc->msr;
da_dsc.passthru = state ? 1 : 0;
@@ -1114,7 +1110,7 @@ static int atc_spdif_out_passthru(struct ct_atc *atc, unsigned char state)
}
dao->ops->set_spos(dao, spos);
dao->ops->commit_write(dao);
- spin_unlock_irqrestore(&atc->atc_lock, flags);
+ mutex_unlock(&atc->atc_mutex);
return err;
}
@@ -1572,7 +1568,7 @@ int __devinit ct_atc_create(struct snd_card *card, struct pci_dev *pci,
atc->msr = msr;
atc->chip_type = chip_type;
- spin_lock_init(&atc->atc_lock);
+ mutex_init(&atc->atc_mutex);
/* Find card model */
err = atc_identify_card(atc);
diff --git a/sound/pci/ctxfi/ctatc.h b/sound/pci/ctxfi/ctatc.h
index a03347232e84..9fe620ea5f3f 100644
--- a/sound/pci/ctxfi/ctatc.h
+++ b/sound/pci/ctxfi/ctatc.h
@@ -19,7 +19,7 @@
#define CTATC_H
#include <linux/types.h>
-#include <linux/spinlock_types.h>
+#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/timer.h>
#include <sound/core.h>
@@ -90,7 +90,7 @@ struct ct_atc {
void (*unmap_audio_buffer)(struct ct_atc *atc, struct ct_atc_pcm *apcm);
unsigned long (*get_ptp_phys)(struct ct_atc *atc, int index);
- spinlock_t atc_lock;
+ struct mutex atc_mutex;
int (*pcm_playback_prepare)(struct ct_atc *atc,
struct ct_atc_pcm *apcm);