From: Christophe Ricard <christophe.ricard@gmail.com>
Date: Sun, 25 Oct 2015 21:54:41 +0000 (+0100)
Subject: NFC: st-nci: Fix host_list verification after SE activation
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4e932acc6fd66c905b2d0ca452dcf69321b6c414;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

NFC: st-nci: Fix host_list verification after SE activation

A secure element can be activated in different order.
The host_list is updated keeping a fixed order:
	<terminal_host_id><uicc_id><ese_id>.

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

diff --git a/drivers/nfc/st-nci/se.c b/drivers/nfc/st-nci/se.c
index 3059baa0f12f..1cc24b6623e0 100644
--- a/drivers/nfc/st-nci/se.c
+++ b/drivers/nfc/st-nci/se.c
@@ -423,7 +423,7 @@ static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
 			     u8 state)
 {
 	struct st_nci_info *info = nci_get_drvdata(ndev);
-	int r;
+	int r, i;
 	struct sk_buff *sk_host_list;
 	u8 host_id;
 
@@ -470,7 +470,10 @@ static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
 	if (r != NCI_HCI_ANY_OK)
 		return r;
 
-	host_id = sk_host_list->data[sk_host_list->len - 1];
+	for (i = 0; i < sk_host_list->len &&
+		sk_host_list->data[i] != se_idx; i++)
+		;
+	host_id = sk_host_list->data[i];
 	kfree_skb(sk_host_list);
 	if (state == ST_NCI_SE_MODE_ON && host_id == se_idx)
 		return se_idx;