firewire: Use atomic_t's for serial numbers.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>

Use atomic_inc_return.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index db7556c48760..df2e9296ad5b 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -434,7 +434,7 @@ static void fw_device_shutdown(struct work_struct *work)
 
 static void fw_device_init(struct work_struct *work)
 {
-        static int serial;
+        static atomic_t serial = ATOMIC_INIT(-1);
         struct fw_device *device =
                 container_of(work, struct fw_device, work.work);
 
@@ -460,7 +460,7 @@ static void fw_device_init(struct work_struct *work)
         device->device.release = fw_device_release;
         device->device.parent = device->card->device;
         snprintf(device->device.bus_id, sizeof device->device.bus_id,
-                 "fw%d", serial++);
+                 "fw%d", atomic_inc_return(&serial));
 
         if (alloc_chrdev_region(&device->device.devt, 0, 1, "fw")) {
                 fw_error("Failed to register char device region.\n");