diff options
| author | Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> | 2021-07-29 13:40:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-29 14:28:03 +0300 |
| commit | ea050c5ee74a996ee4577a5c3852c53cd8219412 (patch) | |
| tree | c3cd5b03b71ab3bb290f12372f957c7a47f6fc12 /drivers/nfc | |
| parent | 9a4af01c35a5bed9d717433651629e4c9865f8f2 (diff) | |
| download | linux-ea050c5ee74a996ee4577a5c3852c53cd8219412.tar.xz | |
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: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/nfc')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index 1aed44629aaa..8890fcd59c39 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -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 @@ out_err: 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; |