USB: cdc-acm: remove unused drain-delay code

The drain-delay code is no longer used, so remove it.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index b84ccec..e0f9feb 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -50,9 +50,6 @@
 #include "cdc-acm.h"
 
 
-#define ACM_CLOSE_TIMEOUT      15      /* seconds to let writes drain */
-
-
 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek"
 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
 
@@ -507,8 +504,6 @@ static void acm_write_bulk(struct urb *urb)
        spin_unlock_irqrestore(&acm->write_lock, flags);
        if (ACM_READY(acm))
                schedule_work(&acm->work);
-       else
-               wake_up_interruptible(&acm->drain_wait);
 }
 
 static void acm_softint(struct work_struct *work)
@@ -1155,7 +1150,6 @@ made_compressed_probe:
        acm->urb_task.func = acm_rx_tasklet;
        acm->urb_task.data = (unsigned long) acm;
        INIT_WORK(&acm->work, acm_softint);
-       init_waitqueue_head(&acm->drain_wait);
        spin_lock_init(&acm->throttle_lock);
        spin_lock_init(&acm->write_lock);
        spin_lock_init(&acm->read_lock);

diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index b4ea54d..7282d1f 100644 (file)
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -112,7 +112,6 @@ struct acm {
        struct mutex mutex;
        struct usb_cdc_line_coding line;                /* bits, stop, parity */
        struct work_struct work;                        /* work queue entry for line discipline waking up */
-       wait_queue_head_t drain_wait;                   /* close processing */
        struct tasklet_struct urb_task;                 /* rx processing */
        spinlock_t throttle_lock;                       /* synchronize throtteling and read callback */
        unsigned int ctrlin;                            /* input control lines (DCD, DSR, RI, break, overruns) */