netdev - Re: [PATCH 2/2] brcmfmac: support parse country code map from DT

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Date:   Mon, 12 Apr 2021 10:22:47 +0200
From:   Arend van Spriel <arend.vanspriel@...adcom.com>
To:     Shawn Guo <shawn.guo@...aro.org>, Kalle Valo <kvalo@...eaurora.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-hsien Lin <chi-hsien.lin@...ineon.com>,
        Wright Feng <wright.feng@...ineon.com>,
        Chung-hsien Hsu <chung-hsien.hsu@...ineon.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com
Subject: Re: [PATCH 2/2] brcmfmac: support parse country code map from DT

On 08-04-2021 13:30, Shawn Guo wrote:
> With any regulatory domain requests coming from either user space or
> 802.11 IE (Information Element), the country is coded in ISO3166
> standard.  It needs to be translated to firmware country code and
> revision with the mapping info in settings->country_codes table.
> Support populate country_codes table by parsing the mapping from DT.

one more thing though...

> Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
> ---
>   .../wireless/broadcom/brcm80211/brcmfmac/of.c | 53 +++++++++++++++++++
>   1 file changed, 53 insertions(+)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> index a7554265f95f..ea5c7f434c2c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> @@ -12,12 +12,61 @@
>   #include "common.h"
>   #include "of.h"
>   
> +static int brcmf_of_get_country_codes(struct device *dev,
> +				      struct brcmf_mp_device *settings)
> +{

[...]

> +		/* String format e.g. US-Q2-86 */
> +		strncpy(cce->iso3166, map, 2);
> +		strncpy(cce->cc, map + 3, 2);
> +
> +		ret = kstrtos32(map + 6, 10, &cce->rev);
> +		if (ret < 0)
> +			dev_warn(dev, "failed to read rev of map %s: %d",
> +				 cce->iso3166, ret);

Do we need a stronger validation of the string format, eg. use sscanf or 
strstr. Would also be nice to have brcmf_dbg(INFO, ...) here to print 
the entry.

Regards,
Arend