From: Ken Mills <ken.k.mills@intel.com>
Date: Thu, 4 Nov 2010 15:16:42 +0000 (+0000)
Subject: n_gsm: Fix length handling
X-Git-Tag: MMI-PSA29.97-13-9~21770^2
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=40e3465db2cffd64e069ca82ee981025554bc159;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

n_gsm: Fix length handling

If the mux is configured with a large mru/mtu the existing code gets the
byte ordering wrong for the header.

Signed-off-by: Ken Mills <ken.k.mills@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 7f79044ae996..81b46585edf7 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -716,8 +716,8 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg)
 		if (msg->len < 128)
 			*--dp = (msg->len << 1) | EA;
 		else {
-			*--dp = (msg->len >> 6) | EA;
-			*--dp = (msg->len & 127) << 1;
+			*--dp = ((msg->len & 127) << 1) | EA;
+			*--dp = (msg->len >> 6) & 0xfe;
 		}
 	}