Commit ea050c5e authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by David S. Miller
Browse files

nfc: trf7970a: 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: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9a4af01c

drivers/nfc/trf7970a.c

+9 −8
Original line number Diff line number Diff line
@@ -643,7 +643,7 @@ static void trf7970a_send_err_upstream(struct trf7970a *trf, int errno) 
}



static int trf7970a_transmit(struct trf7970a *trf, struct sk_buff *skb,

			     unsigned int len, u8 *prefix,

			     unsigned int len, const u8 *prefix,

			     unsigned int prefix_len)

{

	struct spi_transfer t[2];
@@ -1387,9 +1387,10 @@ static int trf7970a_is_iso15693_write_or_lock(u8 cmd) 
	}

}



static int trf7970a_per_cmd_config(struct trf7970a *trf, struct sk_buff *skb)

static int trf7970a_per_cmd_config(struct trf7970a *trf,

				   const struct sk_buff *skb)

{

	u8 *req = skb->data;

	const u8 *req = skb->data;

	u8 special_fcn_reg1, iso_ctrl;

	int ret;
@@ -1791,7 +1792,7 @@ static int _trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, 
static int trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,

			      nfc_digital_cmd_complete_t cb, void *arg)

{

	struct trf7970a *trf = nfc_digital_get_drvdata(ddev);

	const struct trf7970a *trf = nfc_digital_get_drvdata(ddev);



	dev_dbg(trf->dev, "Listen - state: %d, timeout: %d ms\n",

		trf->state, timeout);
@@ -1803,7 +1804,7 @@ static int trf7970a_tg_listen_md(struct nfc_digital_dev *ddev, 
				 u16 timeout, nfc_digital_cmd_complete_t cb,

				 void *arg)

{

	struct trf7970a *trf = nfc_digital_get_drvdata(ddev);

	const struct trf7970a *trf = nfc_digital_get_drvdata(ddev);

	int ret;



	dev_dbg(trf->dev, "Listen MD - state: %d, timeout: %d ms\n",
@@ -1824,7 +1825,7 @@ static int trf7970a_tg_listen_md(struct nfc_digital_dev *ddev, 


static int trf7970a_tg_get_rf_tech(struct nfc_digital_dev *ddev, u8 *rf_tech)

{

	struct trf7970a *trf = nfc_digital_get_drvdata(ddev);

	const struct trf7970a *trf = nfc_digital_get_drvdata(ddev);



	dev_dbg(trf->dev, "Get RF Tech - state: %d, rf_tech: %d\n",

		trf->state, trf->md_rf_tech);
@@ -1974,7 +1975,7 @@ static void trf7970a_shutdown(struct trf7970a *trf) 
	trf7970a_power_down(trf);

}



static int trf7970a_get_autosuspend_delay(struct device_node *np)

static int trf7970a_get_autosuspend_delay(const struct device_node *np)

{

	int autosuspend_delay, ret;
@@ -1987,7 +1988,7 @@ static int trf7970a_get_autosuspend_delay(struct device_node *np) 


static int trf7970a_probe(struct spi_device *spi)

{

	struct device_node *np = spi->dev.of_node;

	const struct device_node *np = spi->dev.of_node;

	struct trf7970a *trf;

	int uvolts, autosuspend_delay, ret;

	u32 clk_freq = TRF7970A_13MHZ_CLOCK_FREQUENCY;