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Message-Id: <20080512163532.476789403@mvista.com>
Date: Mon, 12 May 2008 09:35:32 -0700
From: Daniel Walker <dwalker@...sta.com>
To: paulus@...ba.org
Cc: benh@...nel.crashing.org, mingo@...e.hu, matthew@....cx,
Matthias Kaehlcke <matthias@...hlcke.net>,
linux-kernel@...r.kernel.org
Subject: [PATCH] macintosh: media bay: semaphore to mutex
Signed-off-by: Daniel Walker <dwalker@...sta.com>
---
drivers/macintosh/mediabay.c | 27 ++++++++++++++-------------
1 file changed, 14 insertions(+), 13 deletions(-)
Index: linux-2.6.24/drivers/macintosh/mediabay.c
===================================================================
--- linux-2.6.24.orig/drivers/macintosh/mediabay.c
+++ linux-2.6.24/drivers/macintosh/mediabay.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/kthread.h>
+#include <linux/mutex.h>
#include <asm/prom.h>
#include <asm/pgtable.h>
#include <asm/io.h>
@@ -77,7 +78,7 @@ struct media_bay_info {
int index;
int cached_gpio;
int sleeping;
- struct semaphore lock;
+ struct mutex lock;
#ifdef CONFIG_BLK_DEV_IDE_PMAC
ide_hwif_t *cd_port;
void __iomem *cd_base;
@@ -459,27 +460,27 @@ int media_bay_set_ide_infos(struct devic
if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
int timeout = 5000, index = hwif->index;
- down(&bay->lock);
+ mutex_lock(&bay->lock);
bay->cd_port = hwif;
bay->cd_base = (void __iomem *) base;
bay->cd_irq = irq;
if ((MB_CD != bay->content_id) || bay->state != mb_up) {
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
return 0;
}
printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i);
do {
if (MB_IDE_READY(i)) {
bay->cd_index = index;
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
return 0;
}
mdelay(1);
} while(--timeout);
printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
return -ENODEV;
}
}
@@ -616,10 +617,10 @@ static int media_bay_task(void *x)
while (!kthread_should_stop()) {
for (i = 0; i < media_bay_count; ++i) {
- down(&media_bays[i].lock);
+ mutex_lock(&media_bays[i].lock);
if (!media_bays[i].sleeping)
media_bay_step(i);
- up(&media_bays[i].lock);
+ mutex_unlock(&media_bays[i].lock);
}
msleep_interruptible(MB_POLL_DELAY);
@@ -659,7 +660,7 @@ static int __devinit media_bay_attach(st
bay->index = i;
bay->ops = match->data;
bay->sleeping = 0;
- init_MUTEX(&bay->lock);
+ mutex_init(&bay->lock);
/* Init HW probing */
if (bay->ops->init)
@@ -697,10 +698,10 @@ static int media_bay_suspend(struct maci
if (state.event != mdev->ofdev.dev.power.power_state.event
&& (state.event & PM_EVENT_SLEEP)) {
- down(&bay->lock);
+ mutex_lock(&bay->lock);
bay->sleeping = 1;
set_mb_power(bay, 0);
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
msleep(MB_POLL_DELAY);
mdev->ofdev.dev.power.power_state = state;
}
@@ -719,12 +720,12 @@ static int media_bay_resume(struct macio
they seem to help the 3400 get it right.
*/
/* Force MB power to 0 */
- down(&bay->lock);
+ mutex_lock(&bay->lock);
set_mb_power(bay, 0);
msleep(MB_POWER_DELAY);
if (bay->ops->content(bay) != bay->content_id) {
printk("mediabay%d: content changed during sleep...\n", bay->index);
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
return 0;
}
set_mb_power(bay, 1);
@@ -740,7 +741,7 @@ static int media_bay_resume(struct macio
} while((bay->state != mb_empty) &&
(bay->state != mb_up));
bay->sleeping = 0;
- up(&bay->lock);
+ mutex_unlock(&bay->lock);
}
return 0;
}
--
--
--
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