diff options
Diffstat (limited to 'drivers/usb/gadget/serial.c')
| -rw-r--r-- | drivers/usb/gadget/serial.c | 95 |
1 files changed, 17 insertions, 78 deletions
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c index b992546c394..b58f015554b 100644 --- a/drivers/usb/gadget/serial.c +++ b/drivers/usb/gadget/serial.c @@ -51,82 +51,10 @@ #include "gadget_chips.h" -/* Wait Cond */ - -#define __wait_cond_interruptible(wq, condition, lock, flags, ret) \ -do { \ - wait_queue_t __wait; \ - init_waitqueue_entry(&__wait, current); \ - \ - add_wait_queue(&wq, &__wait); \ - for (;;) { \ - set_current_state(TASK_INTERRUPTIBLE); \ - if (condition) \ - break; \ - if (!signal_pending(current)) { \ - spin_unlock_irqrestore(lock, flags); \ - schedule(); \ - spin_lock_irqsave(lock, flags); \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - break; \ - } \ - current->state = TASK_RUNNING; \ - remove_wait_queue(&wq, &__wait); \ -} while (0) - -#define wait_cond_interruptible(wq, condition, lock, flags) \ -({ \ - int __ret = 0; \ - if (!(condition)) \ - __wait_cond_interruptible(wq, condition, lock, flags, \ - __ret); \ - __ret; \ -}) - -#define __wait_cond_interruptible_timeout(wq, condition, lock, flags, \ - timeout, ret) \ -do { \ - signed long __timeout = timeout; \ - wait_queue_t __wait; \ - init_waitqueue_entry(&__wait, current); \ - \ - add_wait_queue(&wq, &__wait); \ - for (;;) { \ - set_current_state(TASK_INTERRUPTIBLE); \ - if (__timeout == 0) \ - break; \ - if (condition) \ - break; \ - if (!signal_pending(current)) { \ - spin_unlock_irqrestore(lock, flags); \ - __timeout = schedule_timeout(__timeout); \ - spin_lock_irqsave(lock, flags); \ - continue; \ - } \ - ret = -ERESTARTSYS; \ - break; \ - } \ - current->state = TASK_RUNNING; \ - remove_wait_queue(&wq, &__wait); \ -} while (0) - -#define wait_cond_interruptible_timeout(wq, condition, lock, flags, \ - timeout) \ -({ \ - int __ret = 0; \ - if (!(condition)) \ - __wait_cond_interruptible_timeout(wq, condition, lock, \ - flags, timeout, __ret); \ - __ret; \ -}) - - /* Defines */ -#define GS_VERSION_STR "v2.0" -#define GS_VERSION_NUM 0x0200 +#define GS_VERSION_STR "v2.1" +#define GS_VERSION_NUM 0x0201 #define GS_LONG_NAME "Gadget Serial" #define GS_SHORT_NAME "g_serial" @@ -843,6 +771,18 @@ exit_unlock_dev: /* * gs_close */ + +#define GS_WRITE_FINISHED_EVENT_SAFELY(p) \ +({ \ + unsigned long flags; \ + int cond; \ + \ + spin_lock_irqsave(&(p)->port_lock, flags); \ + cond = !(p)->port_dev || !gs_buf_data_avail((p)->port_write_buf); \ + spin_unlock_irqrestore(&(p)->port_lock, flags); \ + cond; \ +}) + static void gs_close(struct tty_struct *tty, struct file *file) { unsigned long flags; @@ -888,10 +828,9 @@ static void gs_close(struct tty_struct *tty, struct file *file) /* at most GS_CLOSE_TIMEOUT seconds */ if (gs_buf_data_avail(port->port_write_buf) > 0) { spin_unlock_irqrestore(&port->port_lock, flags); - wait_cond_interruptible_timeout(port->port_write_wait, - port->port_dev == NULL - || gs_buf_data_avail(port->port_write_buf) == 0, - &port->port_lock, flags, GS_CLOSE_TIMEOUT * HZ); + wait_event_interruptible_timeout(port->port_write_wait, + GS_WRITE_FINISHED_EVENT_SAFELY(port), + GS_CLOSE_TIMEOUT * HZ); spin_lock_irqsave(&port->port_lock, flags); } |