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[PATCH] USB: convert a bunch of USB semaphores to mutexes

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the patch below converts a bunch of semaphores-used-as-mutex in the USB
code to mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arjan van de Ven
2006-01-11 15:55:29 +01:00
committed by Greg Kroah-Hartman
parent 35cce732d9
commit 4186ecf8ad
34 changed files with 389 additions and 372 deletions
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11
drivers/usb/misc/legousbtower.c
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@@ -83,6 +83,7 @@
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/poll.h>
@@ -256,7 +257,7 @@ static void tower_disconnect (struct usb_interface *interface);
/* prevent races between open() and disconnect */
static DECLARE_MUTEX (disconnect_sem);
static DEFINE_MUTEX (disconnect_mutex);
/* file operations needed when we register this driver */
static struct file_operations tower_fops = {
@@ -349,7 +350,7 @@ static int tower_open (struct inode *inode, struct file *file)
nonseekable_open(inode, file);
subminor = iminor(inode);
down (&disconnect_sem);
mutex_lock (&disconnect_mutex);
interface = usb_find_interface (&tower_driver, subminor);
@@ -427,7 +428,7 @@ unlock_exit:
up (&dev->sem);
unlock_disconnect_exit:
up (&disconnect_sem);
mutex_unlock (&disconnect_mutex);
dbg(2, "%s: leave, return value %d ", __FUNCTION__, retval);
@@ -1005,7 +1006,7 @@ static void tower_disconnect (struct usb_interface *interface)
dbg(2, "%s: enter", __FUNCTION__);
down (&disconnect_sem);
mutex_lock (&disconnect_mutex);
dev = usb_get_intfdata (interface);
usb_set_intfdata (interface, NULL);
@@ -1027,7 +1028,7 @@ static void tower_disconnect (struct usb_interface *interface)
up (&dev->sem);
}
up (&disconnect_sem);
mutex_unlock (&disconnect_mutex);
info("LEGO USB Tower #%d now disconnected", (minor - LEGO_USB_TOWER_MINOR_BASE));