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authorDavid S. Miller <davem@sunset.davemloft.net>2007-02-26 10:11:35 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-02-26 11:35:49 -0800
commit3b36fb8471f8639d565b69c9a456a3ef9413df59 (patch)
tree0bee40e06ff42f5a9a15b1e2ff95ac8f9f7719a3 /drivers/sbus
parentabfd336cd79ea154dc71f09272f578a731b81d8c (diff)
downloadlinux-3b36fb8471f8639d565b69c9a456a3ef9413df59.tar.bz2
[SPARC64] bbc_i2c: Fix kenvctrld eating %100 cpu.
Based almost entirely upon a patch by Joerg Friedrich Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/sbus')
-rw-r--r--drivers/sbus/char/bbc_i2c.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/sbus/char/bbc_i2c.c b/drivers/sbus/char/bbc_i2c.c
index 22631f8b9b48..8410587348f1 100644
--- a/drivers/sbus/char/bbc_i2c.c
+++ b/drivers/sbus/char/bbc_i2c.c
@@ -187,19 +187,20 @@ static int wait_for_pin(struct bbc_i2c_bus *bp, u8 *status)
bp->waiting = 1;
add_wait_queue(&bp->wq, &wait);
while (limit-- > 0) {
- u8 val;
-
- set_current_state(TASK_INTERRUPTIBLE);
- *status = val = readb(bp->i2c_control_regs + 0);
- if ((val & I2C_PCF_PIN) == 0) {
+ unsigned long val;
+
+ val = wait_event_interruptible_timeout(
+ bp->wq,
+ (((*status = readb(bp->i2c_control_regs + 0))
+ & I2C_PCF_PIN) == 0),
+ msecs_to_jiffies(250));
+ if (val > 0) {
ret = 0;
break;
}
- msleep_interruptible(250);
}
remove_wait_queue(&bp->wq, &wait);
bp->waiting = 0;
- current->state = TASK_RUNNING;
return ret;
}
@@ -340,7 +341,7 @@ static irqreturn_t bbc_i2c_interrupt(int irq, void *dev_id)
*/
if (bp->waiting &&
!(readb(bp->i2c_control_regs + 0x0) & I2C_PCF_PIN))
- wake_up(&bp->wq);
+ wake_up_interruptible(&bp->wq);
return IRQ_HANDLED;
}