From: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Date: Thu, 20 Sep 2012 06:59:11 +0000 (+0200)
Subject: NFC: Handle RSET in SHDLC_CONNECTING state
X-Git-Tag: firefly_0821_release~3680^2~1949^2~30^2~49^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9010e39f508ee57dc9a7675073659cb9d019a802;p=firefly-linux-kernel-4.4.55.git

NFC: Handle RSET in SHDLC_CONNECTING state

As queue_work() does not guarantee immediate execution of sm_work it
can happen in crossover RSET usecase that connect timer will constantly
change the shdlc state from NEGOTIATING to CONNECTING before shdlc has
chance to handle incoming frame.

Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Acked-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/net/nfc/hci/llc_shdlc.c b/net/nfc/hci/llc_shdlc.c
index d54bfc51c693..a7931c7c57f2 100644
--- a/net/nfc/hci/llc_shdlc.c
+++ b/net/nfc/hci/llc_shdlc.c
@@ -414,7 +414,8 @@ static void llc_shdlc_rcv_u_frame(struct llc_shdlc *shdlc,
 
 	switch (u_frame_modifier) {
 	case U_FRAME_RSET:
-		if (shdlc->state == SHDLC_NEGOCIATING) {
+		if ((shdlc->state == SHDLC_NEGOCIATING) ||
+					(shdlc->state == SHDLC_CONNECTING)) {
 			/* we sent RSET, but chip wants to negociate */
 			if (skb->len > 0)
 				w = skb->data[0];