From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Date: Thu, 29 Jul 2021 10:40:20 +0000 (+0200)
Subject: nfc: microread: constify several pointers
X-Git-Tag: accepted/tizen/unified/20230118.172025~6527^2~361^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a751449f8b477e0e1d97f778ed97ae9f6576b690;p=platform%2Fkernel%2Flinux-rpi.git

nfc: microread: constify several pointers

Several functions do not modify pointed data so arguments and local
variables can be const for correctness and safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/nfc/microread/i2c.c b/drivers/nfc/microread/i2c.c
index f91760c..86f593c 100644
--- a/drivers/nfc/microread/i2c.c
+++ b/drivers/nfc/microread/i2c.c
@@ -73,7 +73,7 @@ static void microread_i2c_remove_len_crc(struct sk_buff *skb)
 	skb_trim(skb, MICROREAD_I2C_FRAME_TAILROOM);
 }
 
-static int check_crc(struct sk_buff *skb)
+static int check_crc(const struct sk_buff *skb)
 {
 	int i;
 	u8 crc = 0;
diff --git a/drivers/nfc/microread/microread.c b/drivers/nfc/microread/microread.c
index 8e847524..9d83cce 100644
--- a/drivers/nfc/microread/microread.c
+++ b/drivers/nfc/microread/microread.c
@@ -358,7 +358,7 @@ static int microread_complete_target_discovered(struct nfc_hci_dev *hdev,
 static void microread_im_transceive_cb(void *context, struct sk_buff *skb,
 				       int err)
 {
-	struct microread_info *info = context;
+	const struct microread_info *info = context;
 
 	switch (info->async_cb_type) {
 	case MICROREAD_CB_TYPE_READER_ALL:
@@ -642,7 +642,7 @@ static const struct nfc_hci_ops microread_hci_ops = {
 };
 
 int microread_probe(void *phy_id, const struct nfc_phy_ops *phy_ops,
-		    char *llc_name, int phy_headroom, int phy_tailroom,
+		    const char *llc_name, int phy_headroom, int phy_tailroom,
 		    int phy_payload, struct nfc_hci_dev **hdev)
 {
 	struct microread_info *info;
diff --git a/drivers/nfc/microread/microread.h b/drivers/nfc/microread/microread.h
index 76152d7..2ee7ccf 100644
--- a/drivers/nfc/microread/microread.h
+++ b/drivers/nfc/microread/microread.h
@@ -11,7 +11,7 @@
 #define DRIVER_DESC "NFC driver for microread"
 
 int microread_probe(void *phy_id, const struct nfc_phy_ops *phy_ops,
-		    char *llc_name, int phy_headroom, int phy_tailroom,
+		    const char *llc_name, int phy_headroom, int phy_tailroom,
 		    int phy_payload, struct nfc_hci_dev **hdev);
 
 void microread_remove(struct nfc_hci_dev *hdev);