tree 69b2b977e5900de9e5a5a2b934ecadc7b0ccbf33
parent 7adc14b14b43b6ca9f2f00ac7a4780577dbe883b
author Jiri Slaby <jslaby@suse.cz> 1298885645 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1298949894 -0800

USB: serial/keyspan_pda, fix potential tty NULL dereferences

Make sure that we check the return value of tty_port_tty_get.
Sometimes it may return NULL and we later dereference that.

There are several places to check. For easier handling,
tty_port_tty_get is moved directly to the palce where needed in
keyspan_pda_rx_interrupt.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>