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Commit af3ce514 authored by Daniel Walker's avatar Daniel Walker Committed by Paul Mackerras
Browse files

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



Signed-off-by: default avatarDaniel Walker <dwalker@mvista.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 56783c5e

drivers/macintosh/adb.c

+15 −15
Original line number Diff line number Diff line
@@ -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);