diff options
Diffstat (limited to 'sound/pci/oxygen/oxygen_io.c')
| -rw-r--r-- | sound/pci/oxygen/oxygen_io.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c index d0cdce0..74e23ef 100644 --- a/sound/pci/oxygen/oxygen_io.c +++ b/sound/pci/oxygen/oxygen_io.c @@ -85,14 +85,22 @@ EXPORT_SYMBOL(oxygen_write32_masked); static int oxygen_ac97_wait(struct oxygen *chip, unsigned int mask) { - unsigned long timeout = jiffies + msecs_to_jiffies(1); - do { - udelay(5); - cond_resched(); - if (oxygen_read8(chip, OXYGEN_AC97_INTERRUPT_STATUS) & mask) - return 0; - } while (time_after_eq(timeout, jiffies)); - return -EIO; + u8 status = 0; + + /* + * Reading the status register also clears the bits, so we have to save + * the read bits in status. + */ + wait_event_timeout(chip->ac97_waitqueue, + ({ status |= oxygen_read8(chip, OXYGEN_AC97_INTERRUPT_STATUS); + status & mask; }), + msecs_to_jiffies(1) + 1); + /* + * Check even after a timeout because this function should not require + * the AC'97 interrupt to be enabled. + */ + status |= oxygen_read8(chip, OXYGEN_AC97_INTERRUPT_STATUS); + return status & mask ? 0 : -EIO; } /* |