| From bf5f981a57da0ef46aa6c31f174354db2edc449b Mon Sep 17 00:00:00 2001 |
| From: Mark Ferrell <mferrell@uplogix.com> |
| Date: Tue, 24 Jul 2012 14:15:13 -0500 |
| Subject: [PATCH] usb: serial: mos7840: Fixup mos7840_chars_in_buffer() |
| |
| commit 5c263b92f828af6a8cf54041db45ceae5af8f2ab upstream. |
| |
| * Use the buffer content length as opposed to the total buffer size. This can |
| be a real problem when using the mos7840 as a usb serial-console as all |
| kernel output is truncated during boot. |
| |
| Signed-off-by: Mark Ferrell <mferrell@uplogix.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| --- |
| drivers/usb/serial/mos7840.c | 9 ++++++--- |
| 1 file changed, 6 insertions(+), 3 deletions(-) |
| |
| diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c |
| index c55d2aa35eaa..a87c43012b5a 100644 |
| --- a/drivers/usb/serial/mos7840.c |
| +++ b/drivers/usb/serial/mos7840.c |
| @@ -1180,9 +1180,12 @@ static int mos7840_chars_in_buffer(struct tty_struct *tty) |
| } |
| |
| spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| - for (i = 0; i < NUM_URBS; ++i) |
| - if (mos7840_port->busy[i]) |
| - chars += URB_TRANSFER_BUFFER_SIZE; |
| + for (i = 0; i < NUM_URBS; ++i) { |
| + if (mos7840_port->busy[i]) { |
| + struct urb *urb = mos7840_port->write_urb_pool[i]; |
| + chars += urb->transfer_buffer_length; |
| + } |
| + } |
| spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| dbg("%s - returns %d", __func__, chars); |
| return chars; |
| -- |
| 1.8.5.2 |
| |
