tree de206436200246909246f9e0df27e4cced13e364
parent 8b53ef33d9d8fa5f771ae11cc6a6e7bc0182beec
author Alexey Dobriyan <adobriyan@gmail.com> 1238621404 +0400
committer Linus Torvalds <torvalds@linux-foundation.org> 1238622648 -0700

serial: fixup /proc/tty/driver/serial after proc_fops conversion

"struct tty_driver *" lies in m->private not in v which is
SEQ_TOKEN_START which is 1 which is enough to trigger NULL dereference
next line:

	BUG: unable to handle kernel NULL pointer dereference at 000000ad
	IP: [<c040d689>] uart_proc_show+0xe/0x2b0

Noticed by Linus.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>