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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/core/devices.c
parent35cce732d9d4d9af6b4ad4d26d8f8c0eddb573a2 (diff)
[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/core/devices.c')
-rw-r--r--drivers/usb/core/devices.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 2684e15b813b..c0f37343a276 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -57,6 +57,7 @@
#include <linux/usb.h>
#include <linux/smp_lock.h>
#include <linux/usbdevice_fs.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include "usb.h"
@@ -570,7 +571,7 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbyte
if (!access_ok(VERIFY_WRITE, buf, nbytes))
return -EFAULT;
- down (&usb_bus_list_lock);
+ mutex_lock(&usb_bus_list_lock);
/* print devices for all busses */
list_for_each_entry(bus, &usb_bus_list, bus_list) {
/* recurse through all children of the root hub */
@@ -580,12 +581,12 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbyte
ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos, bus->root_hub, bus, 0, 0, 0);
usb_unlock_device(bus->root_hub);
if (ret < 0) {
- up(&usb_bus_list_lock);
+ mutex_unlock(&usb_bus_list_lock);
return ret;
}
total_written += ret;
}
- up (&usb_bus_list_lock);
+ mutex_unlock(&usb_bus_list_lock);
return total_written;
}