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| author | Arnd Bergmann <arnd@arndb.de> | 2014-01-02 13:07:47 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-01-14 16:01:20 +0100 |
| commit | 1a21576562507b2b10b9aa53555857868fe51c94 (patch) | |
| tree | 4b251c8c370ee4d31799ddc756388239712c2386 /sound/oss | |
| parent | ALSA: hda - Fix endless vmaster hook call in thinkpad_helper.c (diff) | |
| download | linux-1a21576562507b2b10b9aa53555857868fe51c94.tar.xz linux-1a21576562507b2b10b9aa53555857868fe51c94.zip | |
sound: oss: msnd_pinnacle: avoid interruptible_sleep_on_timeout
We want to remove all sleep_on variants from the kernel because they are
racy. In case of the pinnacle driver, we can replace
interruptible_sleep_on_timeout with wait_event_interruptible_timeout
by changing the meaning of a few flags used in the driver so they
are cleared at wakeup time, which is a somewhat more appropriate
way to do the same, although probably still racy.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/oss')
| -rw-r--r-- | sound/oss/msnd_pinnacle.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/sound/oss/msnd_pinnacle.c b/sound/oss/msnd_pinnacle.c index 11ff7c55240c..c23f9f95bfa5 100644 --- a/sound/oss/msnd_pinnacle.c +++ b/sound/oss/msnd_pinnacle.c @@ -664,12 +664,15 @@ static long dev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) static void dsp_write_flush(void) { + int timeout = get_play_delay_jiffies(dev.DAPF.len); + if (!(dev.mode & FMODE_WRITE) || !test_bit(F_WRITING, &dev.flags)) return; set_bit(F_WRITEFLUSH, &dev.flags); - interruptible_sleep_on_timeout( - &dev.writeflush, - get_play_delay_jiffies(dev.DAPF.len)); + wait_event_interruptible_timeout( + dev.writeflush, + !test_bit(F_WRITEFLUSH, &dev.flags), + timeout); clear_bit(F_WRITEFLUSH, &dev.flags); if (!signal_pending(current)) { current->state = TASK_INTERRUPTIBLE; @@ -897,6 +900,7 @@ static int dsp_read(char __user *buf, size_t len) { int count = len; char *page = (char *)__get_free_page(GFP_KERNEL); + int timeout = get_rec_delay_jiffies(DAR_BUFF_SIZE); if (!page) return -ENOMEM; @@ -936,11 +940,11 @@ static int dsp_read(char __user *buf, size_t len) if (count > 0) { set_bit(F_READBLOCK, &dev.flags); - if (!interruptible_sleep_on_timeout( - &dev.readblock, - get_rec_delay_jiffies(DAR_BUFF_SIZE))) + if (wait_event_interruptible_timeout( + dev.readblock, + test_bit(F_READBLOCK, &dev.flags), + timeout) <= 0) clear_bit(F_READING, &dev.flags); - clear_bit(F_READBLOCK, &dev.flags); if (signal_pending(current)) { free_page((unsigned long)page); return -EINTR; @@ -955,6 +959,7 @@ static int dsp_write(const char __user *buf, size_t len) { int count = len; char *page = (char *)__get_free_page(GFP_KERNEL); + int timeout = get_play_delay_jiffies(DAP_BUFF_SIZE); if (!page) return -ENOMEM; @@ -995,10 +1000,10 @@ static int dsp_write(const char __user *buf, size_t len) if (count > 0) { set_bit(F_WRITEBLOCK, &dev.flags); - interruptible_sleep_on_timeout( - &dev.writeblock, - get_play_delay_jiffies(DAP_BUFF_SIZE)); - clear_bit(F_WRITEBLOCK, &dev.flags); + wait_event_interruptible_timeout( + dev.writeblock, + test_bit(F_WRITEBLOCK, &dev.flags), + timeout); if (signal_pending(current)) { free_page((unsigned long)page); return -EINTR; @@ -1044,7 +1049,7 @@ static __inline__ void eval_dsp_msg(register WORD wMessage) clear_bit(F_WRITING, &dev.flags); } - if (test_bit(F_WRITEBLOCK, &dev.flags)) + if (test_and_clear_bit(F_WRITEBLOCK, &dev.flags)) wake_up_interruptible(&dev.writeblock); break; @@ -1055,7 +1060,7 @@ static __inline__ void eval_dsp_msg(register WORD wMessage) pack_DARQ_to_DARF(dev.last_recbank); - if (test_bit(F_READBLOCK, &dev.flags)) + if (test_and_clear_bit(F_READBLOCK, &dev.flags)) wake_up_interruptible(&dev.readblock); break; |