From cd7b4b3944381713038d39240098908ffeec647d Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Sun, 10 Jan 2016 14:51:38 -0800 Subject: [PATCH] tty: mxser: Remove ASYNC_CLOSING 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 Signed-off-by: Greg Kroah-Hartman --- drivers/tty/mxser.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index e9600cece8da..9a0791e523b5 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -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); -- 2.20.1