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authorArjan van de Ven <arjan@infradead.org>2006-01-11 15:55:29 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2006-03-20 14:49:55 -0800
commit4186ecf8ad16dd05759a09594de6a87e48759ba6 (patch)
tree3ee5292d9f4a36e3eb359b586289ec972bcbaf39 /drivers/usb/misc/ldusb.c
parent35cce732d9d4d9af6b4ad4d26d8f8c0eddb573a2 (diff)
downloadop-kernel-dev-4186ecf8ad16dd05759a09594de6a87e48759ba6.zip
op-kernel-dev-4186ecf8ad16dd05759a09594de6a87e48759ba6.tar.gz
[PATCH] USB: convert a bunch of USB semaphores to mutexes
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>
Diffstat (limited to 'drivers/usb/misc/ldusb.c')
-rw-r--r--drivers/usb/misc/ldusb.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c
index f6bdaf0..966acb4 100644
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -33,6 +33,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/input.h>
@@ -172,7 +173,7 @@ struct ld_usb {
};
/* prevent races between open() and disconnect() */
-static DECLARE_MUTEX(disconnect_sem);
+static DEFINE_MUTEX(disconnect_mutex);
static struct usb_driver ld_usb_driver;
@@ -293,7 +294,7 @@ static int ld_usb_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(&ld_usb_driver, subminor);
@@ -355,7 +356,7 @@ unlock_exit:
up(&dev->sem);
unlock_disconnect_exit:
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return retval;
}
@@ -740,7 +741,7 @@ static void ld_usb_disconnect(struct usb_interface *intf)
struct ld_usb *dev;
int minor;
- down(&disconnect_sem);
+ mutex_lock(&disconnect_mutex);
dev = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
@@ -761,7 +762,7 @@ static void ld_usb_disconnect(struct usb_interface *intf)
up(&dev->sem);
}
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
dev_info(&intf->dev, "LD USB Device #%d now disconnected\n",
(minor - USB_LD_MINOR_BASE));
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