From: Christophe Ricard <christophe.ricard@gmail.com>
Date: Tue, 20 May 2014 20:21:56 +0000 (+0200)
Subject: NFC: st21nfca: Improve read length sequence for P2P mode.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0531107e1cdc4f5254116c1bf972c62fb024a466;p=deliverable%2Flinux.git

NFC: st21nfca: Improve read length sequence for P2P mode.

A DEP_RES with a SUPERVISOR PDU can be up to 16 bytes long.

In order to avoid useless read during p2p, extend first read
sequence to 16 and reduce third sequence to 12 to keep same
total on the full sequence.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/drivers/nfc/st21nfca/i2c.c b/drivers/nfc/st21nfca/i2c.c
index 70564b3f2ab2..ff31939978ae 100644
--- a/drivers/nfc/st21nfca/i2c.c
+++ b/drivers/nfc/st21nfca/i2c.c
@@ -93,7 +93,7 @@ struct st21nfca_i2c_phy {
 	int hard_fault;
 	struct mutex phy_lock;
 };
-static u8 len_seq[] = { 13, 24, 15, 29 };
+static u8 len_seq[] = { 16, 24, 12, 29 };
 static u16 wait_tab[] = { 2, 3, 5, 15, 20, 40};
 
 #define I2C_DUMP_SKB(info, skb)					\