tree e96e4baa27409ab15daaad10f5ff63fac67e4919
parent 1ddd439ef987c9f0209e6ce824b67518f2afe67b
author Jiri Slaby <jirislaby@gmail.com> 1193111113 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1193153526 -0700

Char: cyclades, fix potential NULL dereference

ztxdone is jumped to even if tty is NULL and tty_wakeup placed after
this label doesn't expect NULLed parameter, so this will cause an oops
in some situations (why they scheduled a wakeup there before remove
bottom half processing patch?).

wakeup only in the case when we have non-null tty struct.

Spotted by Adrian Bunk.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>