From b1c43f82c5aa265442f82dba31ce985ebb7aa71c Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 21 Mar 2011 12:25:08 +0200 Subject: tty: make receive_buf() return the amout of bytes received 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 Tested-by: Toby Gray Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/hci_ldisc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers/bluetooth/hci_ldisc.c') diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 48ad2a7ab080..0d4da5e14ba0 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -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) -- cgit v1.2.3