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[PATCH] parport: fix-up schedule_timeout() usage 

Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.  Also use
human-time to jiffies units conversion functions rather than direct HZ
division to avoid rounding issues.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nishanth Aravamudan 2005-09-10 00:27:31 -07:00 committed by Linus Torvalds
parent da4cd8dfe1
commit 7b4ccf8db4
3 changed files with 8 additions and 12 deletions
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7
drivers/parport/ieee1284.c
View File

@ -196,7 +196,7 @@ int parport_wait_peripheral(struct parport *port,
return 1;
/* 40ms of slow polling. */
deadline = jiffies + (HZ + 24) / 25;
deadline = jiffies + msecs_to_jiffies(40);
while (time_before (jiffies, deadline)) {
int ret;
@ -205,7 +205,7 @@ int parport_wait_peripheral(struct parport *port,
/* Wait for 10ms (or until an interrupt occurs if
* the handler is set) */
if ((ret = parport_wait_event (port, (HZ + 99) / 100)) < 0)
if ((ret = parport_wait_event (port, msecs_to_jiffies(10))) < 0)
return ret;
status = parport_read_status (port);
@ -216,8 +216,7 @@ int parport_wait_peripheral(struct parport *port,
/* parport_wait_event didn't time out, but the
* peripheral wasn't actually ready either.
* Wait for another 10ms. */
__set_current_state (TASK_INTERRUPTIBLE);
schedule_timeout ((HZ+ 99) / 100);
schedule_timeout_interruptible(msecs_to_jiffies(10));
}
}

10
drivers/parport/ieee1284_ops.c
View File

@ -60,7 +60,7 @@ size_t parport_ieee1284_write_compat (struct parport *port,
parport_data_forward (port);
while (count < len) {
unsigned long expire = jiffies + dev->timeout;
long wait = (HZ + 99) / 100;
long wait = msecs_to_jiffies(10);
unsigned char mask = (PARPORT_STATUS_ERROR
| PARPORT_STATUS_BUSY);
unsigned char val = (PARPORT_STATUS_ERROR
@ -97,8 +97,7 @@ size_t parport_ieee1284_write_compat (struct parport *port,
our interrupt handler called. */
if (count && no_irq) {
parport_release (dev);
__set_current_state (TASK_INTERRUPTIBLE);
schedule_timeout (wait);
schedule_timeout_interruptible(wait);
parport_claim_or_block (dev);
}
else
@ -542,13 +541,12 @@ size_t parport_ieee1284_ecp_read_data (struct parport *port,
/* Yield the port for a while. */
if (count && dev->port->irq != PARPORT_IRQ_NONE) {
parport_release (dev);
__set_current_state (TASK_INTERRUPTIBLE);
schedule_timeout ((HZ + 24) / 25);
schedule_timeout_interruptible(msecs_to_jiffies(40));
parport_claim_or_block (dev);
}
else
/* We must have the device claimed here. */
parport_wait_event (port, (HZ + 24) / 25);
parport_wait_event (port, msecs_to_jiffies(40));
/* Is there a signal pending? */
if (signal_pending (current))

3
drivers/parport/parport_pc.c
View File

@ -173,8 +173,7 @@ static int change_mode(struct parport *p, int m)
if (time_after_eq (jiffies, expire))
/* The FIFO is stuck. */
return -EBUSY;
__set_current_state (TASK_INTERRUPTIBLE);
schedule_timeout ((HZ + 99) / 100);
schedule_timeout_interruptible(msecs_to_jiffies(10));
if (signal_pending (current))
break;
}