Messages in this thread Patch in this message | | | Date | Tue, 29 Apr 2008 08:27:28 -0700 | From | Daniel Walker <> | Subject | [PATCH] machintosh: ADB driver: adb_handler_sem semaphore to mutex |
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Signed-off-by: Daniel Walker <dwalker@mvista.com>
--- drivers/macintosh/adb.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-)
Index: linux-2.6.25/drivers/macintosh/adb.c =================================================================== --- linux-2.6.25.orig/drivers/macintosh/adb.c +++ linux-2.6.25/drivers/macintosh/adb.c @@ -37,6 +37,7 @@ #include <linux/device.h> #include <linux/kthread.h> #include <linux/platform_device.h> +#include <linux/mutex.h> #include <asm/uaccess.h> #include <asm/semaphore.h> @@ -102,7 +103,7 @@ 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 +111,7 @@ 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 +356,7 @@ 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 +377,7 @@ 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 +455,7 @@ adb_register(int default_id, int handler { 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 +473,7 @@ adb_register(int default_id, int handler ids->id[ids->nids++] = i; } } - up(&adb_handler_sem); + mutex_unlock(&adb_handler_mutex); return ids->nids; } @@ -481,7 +482,7 @@ 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 +494,7 @@ 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 +558,19 @@ adb_try_handler_change(int address, int { 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 +629,10 @@ 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); -- --
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