forked from Minki/linux
tty: Fix unsafe bit ops in tty_throttle_safe/unthrottle_safe
tty->flags needs to be atomically modified. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -156,7 +156,7 @@ int tty_throttle_safe(struct tty_struct *tty)
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if (tty->flow_change != TTY_THROTTLE_SAFE)
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ret = 1;
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else {
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__set_bit(TTY_THROTTLED, &tty->flags);
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set_bit(TTY_THROTTLED, &tty->flags);
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if (tty->ops->throttle)
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tty->ops->throttle(tty);
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}
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@ -187,7 +187,7 @@ int tty_unthrottle_safe(struct tty_struct *tty)
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if (tty->flow_change != TTY_UNTHROTTLE_SAFE)
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ret = 1;
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else {
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__clear_bit(TTY_THROTTLED, &tty->flags);
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clear_bit(TTY_THROTTLED, &tty->flags);
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if (tty->ops->unthrottle)
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tty->ops->unthrottle(tty);
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}
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