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TTY fixes for 3.10-rc7

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Here are two tty core fixes that resolve some regressions that have been
 reported recently.  Both tiny fixes, but needed.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pul tty fixes from Greg Kroah-Hartman:
 "Here are two tty core fixes that resolve some regressions that have
  been reported recently.  Both tiny fixes, but needed"

* tag 'tty-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: Fix transient pty write() EIO
  tty/vt: Return EBUSY if deallocating VT1 and it is busy
This commit is contained in:
Linus Torvalds 2013-06-22 09:00:28 -10:00
commit dcfdc28f30
2 changed files with 6 additions and 12 deletions
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13
drivers/tty/pty.c
View File

@ -244,14 +244,9 @@ static void pty_flush_buffer(struct tty_struct *tty)
static int pty_open(struct tty_struct *tty, struct file *filp) static int pty_open(struct tty_struct *tty, struct file *filp)
{ {
int retval = -ENODEV;
if (!tty || !tty->link) if (!tty || !tty->link)
goto out; return -ENODEV;
set_bit(TTY_IO_ERROR, &tty->flags);
retval = -EIO;
if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
goto out; goto out;
if (test_bit(TTY_PTY_LOCK, &tty->link->flags)) if (test_bit(TTY_PTY_LOCK, &tty->link->flags))
@ -262,9 +257,11 @@ static int pty_open(struct tty_struct *tty, struct file *filp)
clear_bit(TTY_IO_ERROR, &tty->flags); clear_bit(TTY_IO_ERROR, &tty->flags);
clear_bit(TTY_OTHER_CLOSED, &tty->link->flags); clear_bit(TTY_OTHER_CLOSED, &tty->link->flags);
set_bit(TTY_THROTTLED, &tty->flags); set_bit(TTY_THROTTLED, &tty->flags);
retval = 0; return 0;
out: out:
return retval; set_bit(TTY_IO_ERROR, &tty->flags);
return -EIO;
} }
static void pty_set_termios(struct tty_struct *tty, static void pty_set_termios(struct tty_struct *tty,

5
drivers/tty/vt/vt_ioctl.c
View File

@ -289,13 +289,10 @@ static int vt_disallocate(unsigned int vc_num)
struct vc_data *vc = NULL; struct vc_data *vc = NULL;
int ret = 0; int ret = 0;
if (!vc_num)
return 0;
console_lock(); console_lock();
if (VT_BUSY(vc_num)) if (VT_BUSY(vc_num))
ret = -EBUSY; ret = -EBUSY;
else else if (vc_num)
vc = vc_deallocate(vc_num); vc = vc_deallocate(vc_num);
console_unlock(); console_unlock();