diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/storage/libusual.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/usb/storage/libusual.c b/drivers/usb/storage/libusual.c index 55b952084f0c..a28d49122e7a 100644 --- a/drivers/usb/storage/libusual.c +++ b/drivers/usb/storage/libusual.c @@ -9,6 +9,7 @@ #include <linux/usb_usual.h> #include <linux/vmalloc.h> #include <linux/kthread.h> +#include <linux/mutex.h> /* */ @@ -30,7 +31,7 @@ static atomic_t usu_bias = ATOMIC_INIT(USB_US_DEFAULT_BIAS); #define BIAS_NAME_SIZE (sizeof("usb-storage")) static const char *bias_names[3] = { "none", "usb-storage", "ub" }; -static struct semaphore usu_init_notify; +static DEFINE_MUTEX(usu_probe_mutex); static DECLARE_COMPLETION(usu_end_notify); static atomic_t total_threads = ATOMIC_INIT(0); @@ -178,10 +179,7 @@ static int usu_probe_thread(void *arg) int rc; unsigned long flags; - /* A completion does not work here because it's counted. */ - down(&usu_init_notify); - up(&usu_init_notify); - + mutex_lock(&usu_probe_mutex); rc = request_module(bias_names[type]); spin_lock_irqsave(&usu_lock, flags); if (rc == 0 && (st->fls & USU_MOD_FL_PRESENT) == 0) { @@ -194,6 +192,7 @@ static int usu_probe_thread(void *arg) } st->fls &= ~USU_MOD_FL_THREAD; spin_unlock_irqrestore(&usu_lock, flags); + mutex_unlock(&usu_probe_mutex); complete_and_exit(&usu_end_notify, 0); } @@ -204,10 +203,9 @@ static int __init usb_usual_init(void) { int rc; - sema_init(&usu_init_notify, 0); - + mutex_lock(&usu_probe_mutex); rc = usb_register(&usu_driver); - up(&usu_init_notify); + mutex_unlock(&usu_probe_mutex); return rc; } |