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tty: mxser: Remove ASYNC_CLOSING

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The tty core no longer provides ASYNC_CLOSING. Use private flag for
same purpose, which is to clear the fifos at each and every interrupt
during driver close(). The driver uses this sledgehammer approach because
its close/shutdown sequence is hopelessly borked.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-01-10 14:51:38 -08:00 committed by Greg Kroah-Hartman
parent b4749b97ae
commit cd7b4b3944
1 changed files with 5 additions and 4 deletions
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9
drivers/tty/mxser.c
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@ -254,6 +254,7 @@ struct mxser_port {
int xmit_head;
int xmit_tail;
int xmit_cnt;
int closing;
struct ktermios normal_termios;
@ -1081,6 +1082,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
return;
if (tty_port_close_start(port, tty, filp) == 0)
return;
info->closing = 1;
mutex_lock(&port->mutex);
mxser_close_port(port);
mxser_flush_buffer(tty);
@ -1091,6 +1093,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
mxser_shutdown_port(port);
clear_bit(ASYNCB_INITIALIZED, &port->flags);
mutex_unlock(&port->mutex);
info->closing = 0;
/* Right now the tty_port set is done outside of the close_end helper
as we don't yet have everyone using refcounts */
tty_port_close_end(port, tty);
@ -2253,10 +2256,8 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
break;
iir &= MOXA_MUST_IIR_MASK;
tty = tty_port_tty_get(&port->port);
if (!tty ||
(port->port.flags & ASYNC_CLOSING) ||
!(port->port.flags &
ASYNC_INITIALIZED)) {
if (!tty || port->closing ||
!(port->port.flags & ASYNC_INITIALIZED)) {
status = inb(port->ioaddr + UART_LSR);
outb(0x27, port->ioaddr + UART_FCR);
inb(port->ioaddr + UART_MSR);