Merge branch 'topic/ctxfi' into for-linus

* topic/ctxfi:
  ALSA: ctxfi - Fix deadlock with xfi-timer
  ALSA: ctxfi - Replace atc lock to mutex

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);

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);

sound/pci/ctxfi/cttimer.c

@@ -180,7 +180,7 @@ static inline unsigned int ct_xfitimer_get_wc(struct ct_timer *atimer)
  *
  * call this inside the lock and irq disabled
  */
-static int ct_xfitimer_reprogram(struct ct_timer *atimer)
+static int ct_xfitimer_reprogram(struct ct_timer *atimer, int can_update)
 {
 	struct ct_timer_instance *ti;
 	unsigned int min_intr = (unsigned int)-1;
@@ -216,6 +216,8 @@ static int ct_xfitimer_reprogram(struct ct_timer *atimer)
 			ti->frag_count = div_u64((u64)pos * CT_TIMER_FREQ +
 						 rate - 1, rate);
 		}
+		if (ti->need_update && !can_update)
+			min_intr = 0; /* pending to the next irq */
 		if (ti->frag_count < min_intr)
 			min_intr = ti->frag_count;
 	}
@@ -235,7 +237,7 @@ static void ct_xfitimer_check_period(struct ct_timer *atimer)
 
 	spin_lock_irqsave(&atimer->list_lock, flags);
 	list_for_each_entry(ti, &atimer->instance_head, instance_list) {
-		if (ti->need_update) {
+		if (ti->running && ti->need_update) {
 			ti->need_update = 0;
 			ti->apcm->interrupt(ti->apcm);
 		}
@@ -252,7 +254,7 @@ static void ct_xfitimer_callback(struct ct_timer *atimer)
 	spin_lock_irqsave(&atimer->lock, flags);
 	atimer->irq_handling = 1;
 	do {
-		update = ct_xfitimer_reprogram(atimer);
+		update = ct_xfitimer_reprogram(atimer, 1);
 		spin_unlock(&atimer->lock);
 		if (update)
 			ct_xfitimer_check_period(atimer);
@@ -265,6 +267,7 @@ static void ct_xfitimer_callback(struct ct_timer *atimer)
 static void ct_xfitimer_prepare(struct ct_timer_instance *ti)
 {
 	ti->frag_count = ti->substream->runtime->period_size;
+	ti->running = 0;
 	ti->need_update = 0;
 }
 
@@ -273,7 +276,6 @@ static void ct_xfitimer_prepare(struct ct_timer_instance *ti)
 static void ct_xfitimer_update(struct ct_timer *atimer)
 {
 	unsigned long flags;
-	int update;
 
 	spin_lock_irqsave(&atimer->lock, flags);
 	if (atimer->irq_handling) {
@@ -284,10 +286,8 @@ static void ct_xfitimer_update(struct ct_timer *atimer)
 	}
 
 	ct_xfitimer_irq_stop(atimer);
-	update = ct_xfitimer_reprogram(atimer);
+	ct_xfitimer_reprogram(atimer, 0);
 	spin_unlock_irqrestore(&atimer->lock, flags);
-	if (update)
-		ct_xfitimer_check_period(atimer);
 }
 
 static void ct_xfitimer_start(struct ct_timer_instance *ti)
@@ -298,6 +298,8 @@ static void ct_xfitimer_start(struct ct_timer_instance *ti)
 	spin_lock_irqsave(&atimer->lock, flags);
 	if (list_empty(&ti->running_list))
 		atimer->wc = ct_xfitimer_get_wc(atimer);
+	ti->running = 1;
+	ti->need_update = 0;
 	list_add(&ti->running_list, &atimer->running_head);
 	spin_unlock_irqrestore(&atimer->lock, flags);
 	ct_xfitimer_update(atimer);
@@ -310,7 +312,7 @@ static void ct_xfitimer_stop(struct ct_timer_instance *ti)
 
 	spin_lock_irqsave(&atimer->lock, flags);
 	list_del_init(&ti->running_list);
-	ti->need_update = 0;
+	ti->running = 0;
 	spin_unlock_irqrestore(&atimer->lock, flags);
 	ct_xfitimer_update(atimer);
 }