diff options
Diffstat (limited to 'sound/oss/au1550_ac97.c')
-rw-r--r-- | sound/oss/au1550_ac97.c | 122 |
1 files changed, 67 insertions, 55 deletions
diff --git a/sound/oss/au1550_ac97.c b/sound/oss/au1550_ac97.c index c1070e33b32f..a8f626d99c5b 100644 --- a/sound/oss/au1550_ac97.c +++ b/sound/oss/au1550_ac97.c @@ -49,7 +49,6 @@ #include <linux/poll.h> #include <linux/bitops.h> #include <linux/spinlock.h> -#include <linux/smp_lock.h> #include <linux/ac97_codec.h> #include <linux/mutex.h> @@ -77,6 +76,7 @@ /* Boot options * 0 = no VRA, 1 = use VRA if codec supports it */ +static DEFINE_MUTEX(au1550_ac97_mutex); static int vra = 1; module_param(vra, bool, 0); MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it"); @@ -162,25 +162,16 @@ ld2(unsigned int x) static void au1550_delay(int msec) { - unsigned long tmo; - signed long tmo2; - if (in_interrupt()) return; - tmo = jiffies + (msec * HZ) / 1000; - for (;;) { - tmo2 = tmo - jiffies; - if (tmo2 <= 0) - break; - schedule_timeout(tmo2); - } + schedule_timeout_uninterruptible(msecs_to_jiffies(msec)); } static u16 rdcodec(struct ac97_codec *codec, u8 addr) { - struct au1550_state *s = (struct au1550_state *)codec->private_data; + struct au1550_state *s = codec->private_data; unsigned long flags; u32 cmd, val; u16 data; @@ -248,7 +239,7 @@ rdcodec(struct ac97_codec *codec, u8 addr) static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data) { - struct au1550_state *s = (struct au1550_state *)codec->private_data; + struct au1550_state *s = codec->private_data; unsigned long flags; u32 cmd, val; int i; @@ -807,7 +798,9 @@ au1550_llseek(struct file *file, loff_t offset, int origin) static int au1550_open_mixdev(struct inode *inode, struct file *file) { + mutex_lock(&au1550_ac97_mutex); file->private_data = &au1550_state; + mutex_unlock(&au1550_ac97_mutex); return 0; } @@ -824,22 +817,26 @@ mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd, return codec->mixer_ioctl(codec, cmd, arg); } -static int -au1550_ioctl_mixdev(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static long +au1550_ioctl_mixdev(struct file *file, unsigned int cmd, unsigned long arg) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; struct ac97_codec *codec = s->codec; + int ret; + + mutex_lock(&au1550_ac97_mutex); + ret = mixdev_ioctl(codec, cmd, arg); + mutex_unlock(&au1550_ac97_mutex); - return mixdev_ioctl(codec, cmd, arg); + return ret; } static /*const */ struct file_operations au1550_mixer_fops = { - owner:THIS_MODULE, - llseek:au1550_llseek, - ioctl:au1550_ioctl_mixdev, - open:au1550_open_mixdev, - release:au1550_release_mixdev, + .owner = THIS_MODULE, + .llseek = au1550_llseek, + .unlocked_ioctl = au1550_ioctl_mixdev, + .open = au1550_open_mixdev, + .release = au1550_release_mixdev, }; static int @@ -1034,7 +1031,7 @@ copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user) static ssize_t au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; struct dmabuf *db = &s->dma_adc; DECLARE_WAITQUEUE(wait, current); ssize_t ret; @@ -1114,7 +1111,7 @@ out2: static ssize_t au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; struct dmabuf *db = &s->dma_dac; DECLARE_WAITQUEUE(wait, current); ssize_t ret = 0; @@ -1214,7 +1211,7 @@ out2: static unsigned int au1550_poll(struct file *file, struct poll_table_struct *wait) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; unsigned long flags; unsigned int mask = 0; @@ -1253,12 +1250,12 @@ au1550_poll(struct file *file, struct poll_table_struct *wait) static int au1550_mmap(struct file *file, struct vm_area_struct *vma) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; struct dmabuf *db; unsigned long size; int ret = 0; - lock_kernel(); + mutex_lock(&au1550_ac97_mutex); mutex_lock(&s->sem); if (vma->vm_flags & VM_WRITE) db = &s->dma_dac; @@ -1286,7 +1283,7 @@ au1550_mmap(struct file *file, struct vm_area_struct *vma) db->mapped = 1; out: mutex_unlock(&s->sem); - unlock_kernel(); + mutex_unlock(&au1550_ac97_mutex); return ret; } @@ -1343,10 +1340,9 @@ dma_count_done(struct dmabuf *db) static int -au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) +au1550_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; unsigned long flags; audio_buf_info abinfo; count_info cinfo; @@ -1780,6 +1776,17 @@ au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd, return mixdev_ioctl(s->codec, cmd, arg); } +static long +au1550_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + int ret; + + mutex_lock(&au1550_ac97_mutex); + ret = au1550_ioctl(file, cmd, arg); + mutex_unlock(&au1550_ac97_mutex); + + return ret; +} static int au1550_open(struct inode *inode, struct file *file) @@ -1797,21 +1804,22 @@ au1550_open(struct inode *inode, struct file *file) #endif file->private_data = s; + mutex_lock(&au1550_ac97_mutex); /* wait for device to become free */ mutex_lock(&s->open_mutex); while (s->open_mode & file->f_mode) { - if (file->f_flags & O_NONBLOCK) { - mutex_unlock(&s->open_mutex); - return -EBUSY; - } + ret = -EBUSY; + if (file->f_flags & O_NONBLOCK) + goto out; add_wait_queue(&s->open_wait, &wait); __set_current_state(TASK_INTERRUPTIBLE); mutex_unlock(&s->open_mutex); schedule(); remove_wait_queue(&s->open_wait, &wait); set_current_state(TASK_RUNNING); + ret = -ERESTARTSYS; if (signal_pending(current)) - return -ERESTARTSYS; + goto out2; mutex_lock(&s->open_mutex); } @@ -1840,30 +1848,34 @@ au1550_open(struct inode *inode, struct file *file) if (file->f_mode & FMODE_READ) { if ((ret = prog_dmabuf_adc(s))) - return ret; + goto out; } if (file->f_mode & FMODE_WRITE) { if ((ret = prog_dmabuf_dac(s))) - return ret; + goto out; } s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE); - mutex_unlock(&s->open_mutex); mutex_init(&s->sem); - return 0; + ret = 0; +out: + mutex_unlock(&s->open_mutex); +out2: + mutex_unlock(&au1550_ac97_mutex); + return ret; } static int au1550_release(struct inode *inode, struct file *file) { - struct au1550_state *s = (struct au1550_state *)file->private_data; + struct au1550_state *s = file->private_data; - lock_kernel(); + mutex_lock(&au1550_ac97_mutex); if (file->f_mode & FMODE_WRITE) { - unlock_kernel(); + mutex_unlock(&au1550_ac97_mutex); drain_dac(s, file->f_flags & O_NONBLOCK); - lock_kernel(); + mutex_lock(&au1550_ac97_mutex); } mutex_lock(&s->open_mutex); @@ -1880,20 +1892,20 @@ au1550_release(struct inode *inode, struct file *file) s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE)); mutex_unlock(&s->open_mutex); wake_up(&s->open_wait); - unlock_kernel(); + mutex_unlock(&au1550_ac97_mutex); return 0; } static /*const */ struct file_operations au1550_audio_fops = { - owner: THIS_MODULE, - llseek: au1550_llseek, - read: au1550_read, - write: au1550_write, - poll: au1550_poll, - ioctl: au1550_ioctl, - mmap: au1550_mmap, - open: au1550_open, - release: au1550_release, + .owner = THIS_MODULE, + .llseek = au1550_llseek, + .read = au1550_read, + .write = au1550_write, + .poll = au1550_poll, + .unlocked_ioctl = au1550_unlocked_ioctl, + .mmap = au1550_mmap, + .open = au1550_open, + .release = au1550_release, }; MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com"); |