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tty: fix chars_in_buffers

Browse source 
This function does not have an error return and returning an error is
instead interpreted as having a lot of pending bytes.

Reported by Jeff Harris who provided a list of some of the remaining
offenders.

Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alan Cox 2009-07-20 16:05:27 +01:00 • committed by Linus Torvalds
commit 23198fda71
7 changed files with 10 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/usb/class/cdc-acm.c
View file

@ -750,7 +750,7 @@ static int acm_tty_chars_in_buffer(struct tty_struct *tty)
{
struct acm *acm = tty->driver_data;
if (!ACM_READY(acm))
return -EINVAL;
return 0;
/*
* This is inaccurate (overcounts), but it works.
*/

2
drivers/usb/serial/mos7720.c
View file

@ -521,7 +521,7 @@ static int mos7720_chars_in_buffer(struct tty_struct *tty)
mos7720_port = usb_get_serial_port_data(port);
if (mos7720_port == NULL) {
dbg("%s:leaving ...........", __func__);
return -ENODEV;
return 0;
}
for (i = 0; i < NUM_URBS; ++i) {

4
drivers/usb/serial/ti_usb_3410_5052.c
View file

@ -727,7 +727,7 @@ static int ti_write_room(struct tty_struct *tty)
dbg("%s - port %d", __func__, port->number);
if (tport == NULL)
return -ENODEV;
return 0;
spin_lock_irqsave(&tport->tp_lock, flags);
room = ti_buf_space_avail(tport->tp_write_buf);
@ -748,7 +748,7 @@ static int ti_chars_in_buffer(struct tty_struct *tty)
dbg("%s - port %d", __func__, port->number);
if (tport == NULL)
return -ENODEV;
return 0;
spin_lock_irqsave(&tport->tp_lock, flags);
chars = ti_buf_data_avail(tport->tp_write_buf);