On 29/07/2021 12:40, Krzysztof Kozlowski wrote:
> 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>
> ---
>  drivers/nfc/nfcmrvl/fw_dnld.c | 16 +++++++++-------
>  drivers/nfc/nfcmrvl/i2c.c     |  2 +-
>  drivers/nfc/nfcmrvl/main.c    |  2 +-
>  drivers/nfc/nfcmrvl/nfcmrvl.h |  2 +-
>  drivers/nfc/nfcmrvl/spi.c     |  4 ++--
>  drivers/nfc/nfcmrvl/uart.c    |  2 +-
>  6 files changed, 15 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/nfc/nfcmrvl/fw_dnld.c b/drivers/nfc/nfcmrvl/fw_dnld.c
> index aaccb8b76b3e..edac56b01fd1 100644
> --- a/drivers/nfc/nfcmrvl/fw_dnld.c
> +++ b/drivers/nfc/nfcmrvl/fw_dnld.c
> @@ -129,7 +129,7 @@ static void fw_dnld_timeout(struct timer_list *t)
>  }
>  
>  static int process_state_reset(struct nfcmrvl_private *priv,
> -			       struct sk_buff *skb)
> +			       const struct sk_buff *skb)
>  {
>  	if (sizeof(nci_pattern_core_reset_ntf) != skb->len ||
>  	    memcmp(skb->data, nci_pattern_core_reset_ntf,
> @@ -145,7 +145,8 @@ static int process_state_reset(struct nfcmrvl_private *priv,
>  	return 0;
>  }
>  
> -static int process_state_init(struct nfcmrvl_private *priv, struct sk_buff *skb)
> +static int process_state_init(struct nfcmrvl_private *priv,
> +			      const struct sk_buff *skb)
>  {
>  	struct nci_core_set_config_cmd cmd;
>  
> @@ -175,7 +176,7 @@ static void create_lc(struct nfcmrvl_private *priv)
>  }
>  
>  static int process_state_set_ref_clock(struct nfcmrvl_private *priv,
> -				       struct sk_buff *skb)
> +				       const struct sk_buff *skb)
>  {
>  	struct nci_core_set_config_cmd cmd;
>  
> @@ -221,7 +222,7 @@ static int process_state_set_ref_clock(struct nfcmrvl_private *priv,
>  }
>  
>  static int process_state_set_hi_config(struct nfcmrvl_private *priv,
> -				       struct sk_buff *skb)
> +				       const struct sk_buff *skb)
>  {
>  	if (sizeof(nci_pattern_core_set_config_rsp) != skb->len ||
>  	    memcmp(skb->data, nci_pattern_core_set_config_rsp, skb->len))
> @@ -232,7 +233,7 @@ static int process_state_set_hi_config(struct nfcmrvl_private *priv,
>  }
>  
>  static int process_state_open_lc(struct nfcmrvl_private *priv,
> -				 struct sk_buff *skb)
> +				 const struct sk_buff *skb)
>  {
>  	if (sizeof(nci_pattern_core_conn_create_rsp) >= skb->len ||
>  	    memcmp(skb->data, nci_pattern_core_conn_create_rsp,
> @@ -347,7 +348,7 @@ static int process_state_fw_dnld(struct nfcmrvl_private *priv,
>  }
>  
>  static int process_state_close_lc(struct nfcmrvl_private *priv,
> -				  struct sk_buff *skb)
> +				  const struct sk_buff *skb)
>  {
>  	if (sizeof(nci_pattern_core_conn_close_rsp) != skb->len ||
>  	    memcmp(skb->data, nci_pattern_core_conn_close_rsp, skb->len))
> @@ -358,7 +359,8 @@ static int process_state_close_lc(struct nfcmrvl_private *priv,
>  	return 0;
>  }
>  
> -static int process_state_boot(struct nfcmrvl_private *priv, struct sk_buff *skb)
> +static int process_state_boot(struct nfcmrvl_private *priv,
> +			      const struct sk_buff *skb)
>  {
>  	if (sizeof(nci_pattern_proprietary_boot_rsp) != skb->len ||
>  	    memcmp(skb->data, nci_pattern_proprietary_boot_rsp, skb->len))
> diff --git a/drivers/nfc/nfcmrvl/i2c.c b/drivers/nfc/nfcmrvl/i2c.c
> index 59a529e72d96..6e659e77c8a2 100644
> --- a/drivers/nfc/nfcmrvl/i2c.c
> +++ b/drivers/nfc/nfcmrvl/i2c.c
> @@ -182,8 +182,8 @@ static int nfcmrvl_i2c_parse_dt(struct device_node *node,
>  static int nfcmrvl_i2c_probe(struct i2c_client *client,
>  			     const struct i2c_device_id *id)
>  {
> +	const struct nfcmrvl_platform_data *pdata;
>  	struct nfcmrvl_i2c_drv_data *drv_data;
> -	struct nfcmrvl_platform_data *pdata;
>  	struct nfcmrvl_platform_data config;
>  	int ret;
>  
> diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c
> index 6e9e7ce8792c..d8e48bdaf652 100644
> --- a/drivers/nfc/nfcmrvl/main.c
> +++ b/drivers/nfc/nfcmrvl/main.c
> @@ -93,7 +93,7 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
>  				void *drv_data,
>  				struct nfcmrvl_if_ops *ops,
>  				struct device *dev,
> -				struct nfcmrvl_platform_data *pdata)
> +				const struct nfcmrvl_platform_data *pdata)
>  {
>  	struct nfcmrvl_private *priv;
>  	int rc;
> diff --git a/drivers/nfc/nfcmrvl/nfcmrvl.h b/drivers/nfc/nfcmrvl/nfcmrvl.h
> index a715543bc9bf..84fafa95965e 100644
> --- a/drivers/nfc/nfcmrvl/nfcmrvl.h
> +++ b/drivers/nfc/nfcmrvl/nfcmrvl.h
> @@ -94,7 +94,7 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
>  				void *drv_data,
>  				struct nfcmrvl_if_ops *ops,
>  				struct device *dev,
> -				struct nfcmrvl_platform_data *pdata);
> +				const struct nfcmrvl_platform_data *pdata);
>  
>  
>  void nfcmrvl_chip_reset(struct nfcmrvl_private *priv);
> diff --git a/drivers/nfc/nfcmrvl/spi.c b/drivers/nfc/nfcmrvl/spi.c
> index 66696321c645..7b015bb33fc9 100644
> --- a/drivers/nfc/nfcmrvl/spi.c
> +++ b/drivers/nfc/nfcmrvl/spi.c
> @@ -106,7 +106,7 @@ static struct nfcmrvl_if_ops spi_ops = {
>  	.nci_update_config = nfcmrvl_spi_nci_update_config,
>  };
>  
> -static int nfcmrvl_spi_parse_dt(struct device_node *node,
> +static int nfcmrvl_spi_parse_dt(const struct device_node *node,
>  				struct nfcmrvl_platform_data *pdata)

This one is not correct (yet) as it depends on changes in OF/IRQ. I just
found compile configuration which triggers here warning.

Please skip this one patch.


Best regards,
Krzysztof