[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>

diff --git a/drivers/parport/ieee1284.c b/drivers/parport/ieee1284.c
index 694bae1..5b887ba 100644 (file)
--- a/drivers/parport/ieee1284.c
+++ b/drivers/parport/ieee1284.c
@@ -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));
                }
        }
 

diff --git a/drivers/parport/ieee1284_ops.c b/drivers/parport/ieee1284_ops.c
index 6624278..ce1e2aa 100644 (file)
--- a/drivers/parport/ieee1284_ops.c
+++ b/drivers/parport/ieee1284_ops.c
@@ -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))

diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 1b938bb..c6493ad 100644 (file)
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -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;
                        }