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authorPeter Hurley <peter@hurleysoftware.com>2016-04-10 02:53:25 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-04-30 18:26:55 +0200
commitd41861ca19c9e96f12a4f1ebbc8255d00909a232 (patch)
tree4b09c15500d404b0b375469dd673f0bc8fd05f5f /drivers/tty/cyclades.c
parenttty: Replace ASYNC_SUSPENDED bit and update atomically (diff)
downloadlinux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.tar.xz
linux-d41861ca19c9e96f12a4f1ebbc8255d00909a232.zip
tty: Replace ASYNC_INITIALIZED bit and update atomically
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers tty_port_set_initialized() and tty_port_initialized() to abstract atomic bit ops. Note: the transforms for test_and_set_bit() and test_and_clear_bit() are unnecessary as the state transitions are already mutually exclusive; the tty lock prevents concurrent open/close/hangup. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/cyclades.c')
-rw-r--r--drivers/tty/cyclades.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index 9d1e19ba25cb..3840d6b421c4 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -1279,7 +1279,7 @@ static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
spin_lock_irqsave(&card->card_lock, flags);
- if (info->port.flags & ASYNC_INITIALIZED)
+ if (tty_port_initialized(&info->port))
goto errout;
if (!info->type) {
@@ -1364,7 +1364,7 @@ static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
/* enable send, recv, modem !!! */
}
- info->port.flags |= ASYNC_INITIALIZED;
+ tty_port_set_initialized(&info->port, 1);
clear_bit(TTY_IO_ERROR, &tty->flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
@@ -1424,7 +1424,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
struct cyclades_card *card;
unsigned long flags;
- if (!(info->port.flags & ASYNC_INITIALIZED))
+ if (!tty_port_initialized(&info->port))
return;
card = info->card;
@@ -1448,7 +1448,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
some later date (after testing)!!! */
set_bit(TTY_IO_ERROR, &tty->flags);
- info->port.flags &= ~ASYNC_INITIALIZED;
+ tty_port_set_initialized(&info->port, 0);
spin_unlock_irqrestore(&card->card_lock, flags);
} else {
#ifdef CY_DEBUG_OPEN
@@ -1473,7 +1473,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
tty_port_lower_dtr_rts(&info->port);
set_bit(TTY_IO_ERROR, &tty->flags);
- info->port.flags &= ~ASYNC_INITIALIZED;
+ tty_port_set_initialized(&info->port, 0);
spin_unlock_irqrestore(&card->card_lock, flags);
}
@@ -1711,7 +1711,7 @@ static void cy_do_close(struct tty_port *port)
/* Stop accepting input */
cyy_writeb(info, CyCAR, channel & 0x03);
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
- if (info->port.flags & ASYNC_INITIALIZED) {
+ if (tty_port_initialized(&info->port)) {
/* Waiting for on-board buffers to be empty before
closing the port */
spin_unlock_irqrestore(&card->card_lock, flags);
@@ -2334,7 +2334,7 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
info->port.closing_wait = new_serial.closing_wait * HZ / 100;
check_and_exit:
- if (info->port.flags & ASYNC_INITIALIZED) {
+ if (tty_port_initialized(&info->port)) {
cy_set_line_char(info, tty);
ret = 0;
} else {