From: Bill Pemberton <wfp5p@virginia.edu>
Date: Thu, 5 Aug 2010 21:01:06 +0000 (-0400)
Subject: USB: ssu100: refine process_packet in ssu100
X-Git-Tag: firefly_0821_release~9833^2~668^2~17
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9b2cef31f2823558eb92a35624d37439599f3f9f;p=firefly-linux-kernel-4.4.55.git

USB: ssu100: refine process_packet in ssu100

The status information does not appear at the start of each incoming
packet so the check for len < 4 at the start of ssu100_process_packet
is wrong.  Remove it.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 2826f013752d..c7193880a2b6 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -575,12 +575,8 @@ static int ssu100_process_packet(struct tty_struct *tty,
 
 	dbg("%s - port %d", __func__, port->number);
 
-	if (len < 4) {
-		dbg("%s - malformed packet", __func__);
-		return 0;
-	}
-
-	if ((packet[0] == 0x1b) && (packet[1] == 0x1b) &&
+	if ((len >= 4) &&
+	    (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 	    ((packet[2] == 0x00) || (packet[2] == 0x01))) {
 		if (packet[2] == 0x00)
 			priv->shadowLSR = packet[3] & (SERIAL_LSR_OE |