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tty: make receive_buf() return the amout of bytes received

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it makes it simpler to keep track of the amount of
bytes received and simplifies how flush_to_ldisc counts
the remaining bytes. It also fixes a bug of lost bytes
on n_tty when flushing too many bytes via the USB
serial gadget driver.

Tested-by: Stefan Bigler <stefan.bigler@keymile.com>
Tested-by: Toby Gray <toby.gray@realvnc.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi
2011-03-21 12:25:08 +02:00
committed by Greg Kroah-Hartman
parent e9a470f445
commit b1c43f82c5
20 changed files with 125 additions and 113 deletions
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12
drivers/bluetooth/hci_ldisc.c
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@@ -357,22 +357,26 @@ static void hci_uart_tty_wakeup(struct tty_struct *tty)
*
* Return Value: None
*/
static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count)
static unsigned int hci_uart_tty_receive(struct tty_struct *tty,
const u8 *data, char *flags, int count)
{
struct hci_uart *hu = (void *)tty->disc_data;
int received;
if (!hu || tty != hu->tty)
return;
return -ENODEV;
if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
return;
return -EINVAL;
spin_lock(&hu->rx_lock);
hu->proto->recv(hu, (void *) data, count);
received = hu->proto->recv(hu, (void *) data, count);
hu->hdev->stat.byte_rx += count;
spin_unlock(&hu->rx_lock);
tty_unthrottle(tty);
return received;
}
static int hci_uart_register_dev(struct hci_uart *hu)