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Date: Sat, 9 Apr 2016 17:06:48 -0700
From: Peter Hurley <peter@...leysoftware.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org,
Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH] tty: Replace TTY_IO_ERROR bit tests with tty_io_error()
Abstract TTY_IO_ERROR status test treewide with tty_io_error().
NB: tty->flags uses atomic bit ops; replace non-atomic bit test
with test_bit().
Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
v3: redo of an earlier patch titled "tty: Use test_bit() with tty->flags"
v2: rebase
arch/ia64/hp/sim/simserial.c | 2 +-
drivers/char/pcmcia/synclink_cs.c | 2 +-
drivers/isdn/i4l/isdn_tty.c | 6 +++---
drivers/s390/char/tty3270.c | 4 ++--
drivers/staging/dgnc/dgnc_tty.c | 2 +-
drivers/tty/amiserial.c | 6 +++---
drivers/tty/mxser.c | 7 +++----
drivers/tty/pty.c | 2 +-
drivers/tty/serial/crisv10.c | 5 ++---
drivers/tty/serial/serial_core.c | 8 ++++----
drivers/tty/synclink.c | 4 ++--
drivers/tty/synclink_gt.c | 4 ++--
drivers/tty/synclinkmp.c | 4 ++--
drivers/tty/tty_io.c | 5 ++---
drivers/tty/tty_port.c | 2 +-
include/linux/tty.h | 5 +++++
net/irda/ircomm/ircomm_tty.c | 2 +-
net/irda/ircomm/ircomm_tty_ioctl.c | 6 +++---
18 files changed, 39 insertions(+), 37 deletions(-)
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index e70cade..21fd50d 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -300,7 +300,7 @@ static int rs_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
(cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 22c2765..825db42 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2246,7 +2246,7 @@ static int mgslpc_ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 947d5c9..f1edc08 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1351,7 +1351,7 @@ isdn_tty_tiocmget(struct tty_struct *tty)
if (isdn_tty_paranoia_check(info, tty->name, __func__))
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
mutex_lock(&modem_info_mutex);
@@ -1378,7 +1378,7 @@ isdn_tty_tiocmset(struct tty_struct *tty,
if (isdn_tty_paranoia_check(info, tty->name, __func__))
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
#ifdef ISDN_DEBUG_MODEM_IOCTL
@@ -1419,7 +1419,7 @@ isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
switch (cmd) {
case TCSBRK: /* SVID version: non-zero arg --> no break */
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index e96fc7f..080a987 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1804,7 +1804,7 @@ static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
tp = tty->driver_data;
if (!tp)
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
return kbd_ioctl(tp->kbd, cmd, arg);
}
@@ -1818,7 +1818,7 @@ static long tty3270_compat_ioctl(struct tty_struct *tty,
tp = tty->driver_data;
if (!tp)
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
}
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index bcd2bdf..5c22159 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1255,7 +1255,7 @@ static int dgnc_block_til_ready(struct tty_struct *tty,
if (file->f_flags & O_NONBLOCK)
break;
- if (tty->flags & (1 << TTY_IO_ERROR)) {
+ if (tty_io_error(tty)) {
retval = -EIO;
break;
}
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index eacf4c9..183e98e 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1143,7 +1143,7 @@ static int rs_tiocmget(struct tty_struct *tty)
if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
control = info->MCR;
@@ -1165,7 +1165,7 @@ static int rs_tiocmset(struct tty_struct *tty, unsigned int set,
if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
local_irq_save(flags);
@@ -1250,7 +1250,7 @@ static int rs_ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
(cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 2f12bb9..f23c2a1 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1334,7 +1334,7 @@ static int mxser_tiocmget(struct tty_struct *tty)
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
+ if (tty_io_error(tty))
return -EIO;
control = info->MCR;
@@ -1361,7 +1361,7 @@ static int mxser_tiocmset(struct tty_struct *tty,
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
+ if (tty_io_error(tty))
return -EIO;
spin_lock_irqsave(&info->slock, flags);
@@ -1715,8 +1715,7 @@ static int mxser_ioctl(struct tty_struct *tty,
return 0;
}
- if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
- test_bit(TTY_IO_ERROR, &tty->flags))
+ if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && tty_io_error(tty))
return -EIO;
switch (cmd) {
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index e16a49b..d8afe77 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -44,7 +44,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
if (tty->driver->subtype == PTY_TYPE_MASTER)
WARN_ON(tty->count > 1);
else {
- if (test_bit(TTY_IO_ERROR, &tty->flags))
+ if (tty_io_error(tty))
return;
if (tty->count > 2)
return;
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index c0172bf54..5469903 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -3445,7 +3445,7 @@ rs_ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
(cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
@@ -3755,8 +3755,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
* If non-blocking mode is set, or the port is not enabled,
* then make the check up front and then exit.
*/
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
+ if ((filp->f_flags & O_NONBLOCK) || tty_io_error(tty)) {
info->port.flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index a126a60..67b3950 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -969,7 +969,7 @@ static int uart_tiocmget(struct tty_struct *tty)
int result = -EIO;
mutex_lock(&port->mutex);
- if (!(tty->flags & (1 << TTY_IO_ERROR))) {
+ if (!tty_io_error(tty)) {
result = uport->mctrl;
spin_lock_irq(&uport->lock);
result |= uport->ops->get_mctrl(uport);
@@ -989,7 +989,7 @@ uart_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)
int ret = -EIO;
mutex_lock(&port->mutex);
- if (!(tty->flags & (1 << TTY_IO_ERROR))) {
+ if (!tty_io_error(tty)) {
uart_update_mctrl(uport, set, clear);
ret = 0;
}
@@ -1238,7 +1238,7 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd,
if (ret != -ENOIOCTLCMD)
goto out;
- if (tty->flags & (1 << TTY_IO_ERROR)) {
+ if (tty_io_error(tty)) {
ret = -EIO;
goto out;
}
@@ -1257,7 +1257,7 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd,
mutex_lock(&port->mutex);
- if (tty->flags & (1 << TTY_IO_ERROR)) {
+ if (tty_io_error(tty)) {
ret = -EIO;
goto out_up;
}
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index f5476e2..8b22772 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -2972,7 +2972,7 @@ static int mgsl_ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
@@ -3270,7 +3270,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
printk("%s(%d):block_til_ready on %s\n",
__FILE__,__LINE__, tty->driver->name );
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) {
/* nonblock mode is set or port is not enabled */
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index c0a2f5a..1f7d6d9 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -1032,7 +1032,7 @@ static int ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
@@ -3269,7 +3269,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
DBGINFO(("%s block_til_ready\n", tty->driver->name));
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) {
/* nonblock mode is set or port is not enabled */
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 90da0c7..e938799 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -1261,7 +1261,7 @@ static int ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
@@ -3285,7 +3285,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
printk("%s(%d):%s block_til_ready()\n",
__FILE__,__LINE__, tty->driver->name );
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) {
/* nonblock mode is set or port is not enabled */
/* just verify that callout device is not active */
port->flags |= ASYNC_NORMAL_ACTIVE;
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 9b04d72..320dc4d 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1070,7 +1070,7 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
if (tty_paranoia_check(tty, inode, "tty_read"))
return -EIO;
- if (!tty || (test_bit(TTY_IO_ERROR, &tty->flags)))
+ if (!tty || tty_io_error(tty))
return -EIO;
/* We want to wait for the line discipline to sort out in this
@@ -1245,8 +1245,7 @@ static ssize_t tty_write(struct file *file, const char __user *buf,
if (tty_paranoia_check(tty, file_inode(file), "tty_write"))
return -EIO;
- if (!tty || !tty->ops->write ||
- (test_bit(TTY_IO_ERROR, &tty->flags)))
+ if (!tty || !tty->ops->write || tty_io_error(tty))
return -EIO;
/* Short term debug to catch buggy drivers */
if (tty->ops->write_room == NULL)
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index dbcca30..9127c54 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -364,7 +364,7 @@ int tty_port_block_til_ready(struct tty_port *port,
/* if non-blocking mode is set we can pass directly to open unless
the port has just hung up or is in another error state */
- if (tty->flags & (1 << TTY_IO_ERROR)) {
+ if (tty_io_error(tty)) {
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3b09f23..68d829b 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -360,6 +360,11 @@ static inline void tty_set_flow_change(struct tty_struct *tty, int val)
smp_mb();
}
+static inline bool tty_io_error(struct tty_struct *tty)
+{
+ return test_bit(TTY_IO_ERROR, &tty->flags);
+}
+
#ifdef CONFIG_TTY
extern void console_init(void);
extern void tty_kref_put(struct tty_struct *tty);
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index da126ee..840b82f 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -280,7 +280,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
* If non-blocking mode is set, or the port is not enabled,
* then make the check up front and then exit.
*/
- if (test_bit(TTY_IO_ERROR, &tty->flags)) {
+ if (tty_io_error(tty)) {
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c
index d3687aa..9beb011 100644
--- a/net/irda/ircomm/ircomm_tty_ioctl.c
+++ b/net/irda/ircomm/ircomm_tty_ioctl.c
@@ -190,7 +190,7 @@ int ircomm_tty_tiocmget(struct tty_struct *tty)
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
unsigned int result;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
result = ((self->settings.dte & IRCOMM_RTS) ? TIOCM_RTS : 0)
@@ -213,7 +213,7 @@ int ircomm_tty_tiocmset(struct tty_struct *tty,
{
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
IRDA_ASSERT(self != NULL, return -1;);
@@ -362,7 +362,7 @@ int ircomm_tty_ioctl(struct tty_struct *tty,
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
(cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
}
--
2.8.1
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