pcmcia: synclink_cs: fix potential tty NULL dereference
tty_port_tty_get() can return NULL after port hangup that may happen anytime.
The patch adds checks that tty_port_tty_get() returns nonNULL around places
where tty is actually used.
I have no actual hardware to test the patch, so I have updated rx side
processing from common sense only.
v2: rx handling updated according Alan Cox feedback.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed