The patch titled
tty_ioctl: soft carrier handling
has been added to the -mm tree. Its filename is
tty_ioctl-soft-carrier-handling.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: tty_ioctl: soft carrier handling
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
First cut at moving the soft carrier handling knowledge entirely into the core
code. One or two drivers still needed to snoop these functions to track
CLOCAL internally. Instead make TIOCSSOFTCAR generate the same driver calls
as other termios ioctls changing the clocal flag. This allows us to remove
any driver knowledge and special casing. Also while we are at it we can fix
the error handling.
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/tty_ioctl.c | 33 +++++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)
diff -puN drivers/char/tty_ioctl.c~tty_ioctl-soft-carrier-handling drivers/char/tty_ioctl.c
--- a/drivers/char/tty_ioctl.c~tty_ioctl-soft-carrier-handling
+++ a/drivers/char/tty_ioctl.c
@@ -756,6 +756,32 @@ static int send_prio_char(struct tty_str
}
/**
+ * tty_change_softcar - carrier change ioctl helper
+ * @tty: tty to update
+ * @arg: enable/disable CLOCAL
+ *
+ * Perform a change to the CLOCAL state and call into the driver
+ * layer to make it visible. All done with the termios mutex
+ */
+
+static int tty_change_softcar(struct tty_struct *tty, int arg)
+{
+ int ret = 0;
+ int bit = arg ? CLOCAL : 0;
+ struct ktermios old = *tty->termios;
+
+ mutex_lock(&tty->termios_mutex);
+ tty->termios->c_cflag &= ~CLOCAL;
+ tty->termios->c_cflag |= bit;
+ if (tty->driver->set_termios)
+ tty->driver->set_termios(tty, &old);
+ if ((tty->termios->c_cflag & CLOCAL) != bit)
+ ret = -EINVAL;
+ mutex_unlock(&tty->termios_mutex);
+ return ret;
+}
+
+/**
* tty_mode_ioctl - mode related ioctls
* @tty: tty for the ioctl
* @file: file pointer for the tty
@@ -865,12 +891,7 @@ int tty_mode_ioctl(struct tty_struct *tt
case TIOCSSOFTCAR:
if (get_user(arg, (unsigned int __user *) arg))
return -EFAULT;
- mutex_lock(&tty->termios_mutex);
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- mutex_unlock(&tty->termios_mutex);
- return 0;
+ return tty_change_softcar(tty, arg);
default:
return -ENOIOCTLCMD;
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are
origin.patch
add-time_is_after_jiffies-and-others-which-compare-with-jiffies.patch
libata-isolate-and-rework-cable-logic.patch
pata_amd-fix-sparse-warning.patch
3c501-further-coding-style-fixes.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch
parisc-new-termios-definitions.patch
char-riscom-fix-rc_board-indexing.patch
crisv10-prepare-for-bkl-push-down.patch
fix-tty-speed-handling-on-8250.patch
uart_get_baud_rate-stop-mangling-termios.patch
do_task_stat-dont-take-rcu_read_lock.patch
amiserial-prepare-for-locking-relaxation-in-caller.patch
cyclades-prepare-for-relaxed-locking-in-callers.patch
epca-lock_kernel-push-down.patch
esp-lock_kernel-push-down.patch
isicom-prepare-for-lock_kernel-push-down.patch
isicom-istallion-prepare-for-lock_kernel-pushdown.patch
mxser-prepare-for-bkl-pushdown.patch
riscom8-prepare-for-bkl-pushdown.patch
rocket-prepare-for-bkl-pushdown.patch
serial167-prepare-to-push-bkl-down-into-drivers.patch
specialix-prepare-for-bkl-pushdown.patch
stallion-prepare-for-bkl-push-down.patch
sx-prepare-for-bkl-pushdown.patch
synclink-series-prepare-for-bkl-pushdown.patch
viocons-bkl-locking.patch
vt_ioctl-prepare-for-bkl-push-down.patch
isdn_tty-prepare-for-bkl-push-down.patch
68360serial-note-that-there-isnt-any-info-mcr-locking.patch
serial_core-prepare-for-bkl-push-down.patch
tty-bkl-pushdown.patch
tty-bkl-pushdown-fix1.patch
redo-locking-of-tty-pgrp.patch
resume-tty-on-susp-and-fix-crnl-order-in-n_tty-line-discipline.patch
tty_io-fix-remaining-pid-struct-locking.patch
tty_io-fix-remaining-pid-struct-locking-small-cleanup.patch
tty_ioctl-locking-for-tty_wait_until_sent.patch
tty_ioctl-soft-carrier-handling.patch
istallion-tiocg-ssoftcar-handling-removal.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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