[UPDATE PATCH] cdrom/sonycd535: replace schedule_timeout() with msleep()

Nishanth Aravamudan
2005-01-10T21:35:17Z

> msleep_interruptible-drivers_cdrom_sonycd535.patch

> msleep_interruptible-drivers_cdrom_sonycd535_2.patch

These two patches are combined in the following, please replace.

Description: Use msleep() instead of schedule_timeout() to guarantee the task
delays as expected. Although TASK_INTERRUPTIBLE is used in the original code,
the schedule_timeout() return conditions for such a state are not checked
appropriately; therefore, TASK_UNINTERRUPTIBLE should be ok (and, hence,
msleep()).

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>

--- 2.6.10-v/drivers/cdrom/sonycd535.c 2004-12-24 13:35:50.000000000 -0800
+++ 2.6.10/drivers/cdrom/sonycd535.c 2005-01-06 10:18:47.000000000 -0800
@@ -129,6 +129,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
+#include <linux/delay.h>

#define REALLY_SLOW_IO
#include <asm/system.h>
@@ -896,9 +897,8 @@ do_cdu535_request(request_queue_t * q)
}
if (readStatus == BAD_STATUS) {
/* Sleep for a while, then retry */
- set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irq(&sonycd535_lock);
- schedule_timeout(RETRY_FOR_BAD_STATUS*HZ/10);
+ msleep(RETRY_FOR_BAD_STATUS*100);
spin_lock_irq(&sonycd535_lock);
}
#if DEBUG > 0
@@ -1478,8 +1478,7 @@ static int __init sony535_init(void)
/* look for the CD-ROM, follows the procedure in the DOS driver */
inb(select_unit_reg);
/* wait for 40 18 Hz ticks (reverse-engineered from DOS driver) */
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout((HZ+17)*40/18);
+ msleep(2222);
inb(result_reg);

outb(0, read_status_reg); /* does a reset? */