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[POWERPC] macintosh: ADB driver: adb_handler_sem semaphore to mutex

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Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Daniel Walker 2008-05-03 06:34:03 +10:00 committed by Paul Mackerras
parent 56783c5e4d
commit af3ce514ad
1 changed files with 15 additions and 15 deletions
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30
drivers/macintosh/adb.c
View file

@ -37,7 +37,7 @@
#include <linux/device.h>
#include <linux/kthread.h>
#include <linux/platform_device.h>
#include <linux/semaphore.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#ifdef CONFIG_PPC
@ -102,7 +102,7 @@ static struct adb_handler {
} adb_handler[16];
/*
* The adb_handler_sem mutex protects all accesses to the original_address
* The adb_handler_mutex mutex protects all accesses to the original_address
* and handler_id fields of adb_handler[i] for all i, and changes to the
* handler field.
* Accesses to the handler field are protected by the adb_handler_lock
@ -110,7 +110,7 @@ static struct adb_handler {
* time adb_unregister returns, we know that the old handler isn't being
* called.
*/
static DECLARE_MUTEX(adb_handler_sem);
static DEFINE_MUTEX(adb_handler_mutex);
static DEFINE_RWLOCK(adb_handler_lock);
#if 0
@ -355,7 +355,7 @@ do_adb_reset_bus(void)
msleep(500);
}
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
write_lock_irq(&adb_handler_lock);
memset(adb_handler, 0, sizeof(adb_handler));
write_unlock_irq(&adb_handler_lock);
@ -376,7 +376,7 @@ do_adb_reset_bus(void)
if (adb_controller->autopoll)
adb_controller->autopoll(autopoll_devs);
}
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
blocking_notifier_call_chain(&adb_client_list,
ADB_MSG_POST_RESET, NULL);
@ -454,7 +454,7 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
{
int i;
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
ids->nids = 0;
for (i = 1; i < 16; i++) {
if ((adb_handler[i].original_address == default_id) &&
@ -472,7 +472,7 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
ids->id[ids->nids++] = i;
}
}
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
return ids->nids;
}
@ -481,7 +481,7 @@ adb_unregister(int index)
{
int ret = -ENODEV;
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
write_lock_irq(&adb_handler_lock);
if (adb_handler[index].handler) {
while(adb_handler[index].busy) {
@ -493,7 +493,7 @@ adb_unregister(int index)
adb_handler[index].handler = NULL;
}
write_unlock_irq(&adb_handler_lock);
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
return ret;
}
@ -557,19 +557,19 @@ adb_try_handler_change(int address, int new_id)
{
int ret;
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
ret = try_handler_change(address, new_id);
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
return ret;
}
int
adb_get_infos(int address, int *original_address, int *handler_id)
{
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
*original_address = adb_handler[address].original_address;
*handler_id = adb_handler[address].handler_id;
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
return (*original_address != 0);
}
@ -628,10 +628,10 @@ do_adb_query(struct adb_request *req)
case ADB_QUERY_GETDEVINFO:
if (req->nbytes < 3)
break;
down(&adb_handler_sem);
mutex_lock(&adb_handler_mutex);
req->reply[0] = adb_handler[req->data[2]].original_address;
req->reply[1] = adb_handler[req->data[2]].handler_id;
up(&adb_handler_sem);
mutex_unlock(&adb_handler_mutex);
req->complete = 1;
req->reply_len = 2;
adb_write_done(req);