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keyspan: fix oops

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If we get a data URB back from the hardware after we have put the tty to
bed we go kaboom.  Fortunately all we need to do is process the URB without
trying to ram its contents down the throat of an ex-tty.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@akpm@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-01-21 17:18:24 -08:00 committed by Linus Torvalds
parent 1fc3858a63
commit a5569a565f
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/serial/keyspan.c
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@ -447,7 +447,7 @@ static void usa26_indat_callback(struct urb *urb)
port = (struct usb_serial_port *) urb->context;
tty = port->tty;
if (urb->actual_length) {
if (tty && urb->actual_length) {
/* 0x80 bit is error flag */
if ((data[0] & 0x80) == 0) {
/* no errors on individual bytes, only possible overrun err*/