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path: root/drivers/usb/class/cdc-acm.c
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Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c79
1 files changed, 6 insertions, 73 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 27346d69f393..bc03b0a690b4 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -780,20 +780,9 @@ static int acm_tty_write(struct tty_struct *tty,
}
if (acm->susp_count) {
- if (acm->putbuffer) {
- /* now to preserve order */
- usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
- acm->putbuffer = NULL;
- }
usb_anchor_urb(wb->urb, &acm->delayed);
spin_unlock_irqrestore(&acm->write_lock, flags);
return count;
- } else {
- if (acm->putbuffer) {
- /* at this point there is no good way to handle errors */
- acm_start_wb(acm, acm->putbuffer);
- acm->putbuffer = NULL;
- }
}
stat = acm_start_wb(acm, wb);
@@ -804,66 +793,6 @@ static int acm_tty_write(struct tty_struct *tty,
return count;
}
-static void acm_tty_flush_chars(struct tty_struct *tty)
-{
- struct acm *acm = tty->driver_data;
- struct acm_wb *cur;
- int err;
- unsigned long flags;
-
- spin_lock_irqsave(&acm->write_lock, flags);
-
- cur = acm->putbuffer;
- if (!cur) /* nothing to do */
- goto out;
-
- acm->putbuffer = NULL;
- err = usb_autopm_get_interface_async(acm->control);
- if (err < 0) {
- cur->use = 0;
- acm->putbuffer = cur;
- goto out;
- }
-
- if (acm->susp_count)
- usb_anchor_urb(cur->urb, &acm->delayed);
- else
- acm_start_wb(acm, cur);
-out:
- spin_unlock_irqrestore(&acm->write_lock, flags);
- return;
-}
-
-static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct acm *acm = tty->driver_data;
- struct acm_wb *cur;
- int wbn;
- unsigned long flags;
-
-overflow:
- cur = acm->putbuffer;
- if (!cur) {
- spin_lock_irqsave(&acm->write_lock, flags);
- wbn = acm_wb_alloc(acm);
- if (wbn >= 0) {
- cur = &acm->wb[wbn];
- acm->putbuffer = cur;
- }
- spin_unlock_irqrestore(&acm->write_lock, flags);
- if (!cur)
- return 0;
- }
-
- if (cur->len == acm->writesize) {
- acm_tty_flush_chars(tty);
- goto overflow;
- }
-
- cur->buf[cur->len++] = ch;
- return 1;
-}
-
static int acm_tty_write_room(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
@@ -1585,6 +1514,7 @@ static void acm_disconnect(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
struct tty_struct *tty;
+ int i;
/* sibling interface is already cleaning up */
if (!acm)
@@ -1615,6 +1545,11 @@ static void acm_disconnect(struct usb_interface *intf)
tty_unregister_device(acm_tty_driver, acm->minor);
+ usb_free_urb(acm->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(acm->wb[i].urb);
+ for (i = 0; i < acm->rx_buflimit; i++)
+ usb_free_urb(acm->read_urbs[i]);
acm_write_buffers_free(acm);
usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
acm_read_buffers_free(acm);
@@ -1987,8 +1922,6 @@ static const struct tty_operations acm_ops = {
.cleanup = acm_tty_cleanup,
.hangup = acm_tty_hangup,
.write = acm_tty_write,
- .put_char = acm_tty_put_char,
- .flush_chars = acm_tty_flush_chars,
.write_room = acm_tty_write_room,
.ioctl = acm_tty_ioctl,
.throttle = acm_tty_throttle,