Revert "8250: Fix tcsetattr to avoid ioctl(TIOCMIWAIT) hang"
This reverts commit 47d3904f. Crashes any x86 serial console bootup: Console: colour VGA+ 80x25 BUG: unable to handle kernel NULL pointer dereference at 0000000000000158 IP: [<ffffffff811ebcb4>] serial8250_do_set_termios+0x1d4/0x430 ... Signed-off-by: NIngo Molnar <mingo@elte.hu> Cc: Greg KH <gregkh@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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