From: Anderson Lizardo <anderson.lizardo@openbossa.org>
Date: Fri, 19 Jul 2013 17:34:16 +0000 (-0400)
Subject: attrib: Allow dec_read_resp() to just check if PDU is valid
X-Git-Tag: android-x86-4.4-r3~7837
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=638790716fa36c221f35bd2639754b6d43798741;p=android-x86%2Fexternal-bluetooth-bluez.git

attrib: Allow dec_read_resp() to just check if PDU is valid

If a NULL "value" parameter is given, only check whether PDU is valid,
without copying attribute value to a buffer.
---

diff --git a/attrib/att.c b/attrib/att.c
index d5f4f68e1..753c75398 100644
--- a/attrib/att.c
+++ b/attrib/att.c
@@ -704,12 +704,12 @@ ssize_t dec_read_resp(const uint8_t *pdu, size_t len, uint8_t *value,
 	if (pdu == NULL)
 		return -EINVAL;
 
-	if (value == NULL)
-		return -EINVAL;
-
 	if (pdu[0] != ATT_OP_READ_RESP)
 		return -EINVAL;
 
+	if (value == NULL)
+		return len - 1;
+
 	if (vlen < (len - 1))
 		return -ENOBUFS;