netdev - Re: [PATCH v2 06/35] brcmfmac: firmware: Support passing in multiple board

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Message-ID: <911f7e95-7d6a-1c7f-c8de-0d4e0c7b7238@broadcom.com>
Date:   Thu, 6 Jan 2022 13:16:41 +0100
From:   Arend van Spriel <arend.vanspriel@...adcom.com>
To:     Hector Martin <marcan@...can.st>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        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>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Rafał Miłecki <zajec5@...il.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        "John W. Linville" <linville@...driver.com>,
        "brian m. carlson" <sandals@...stytoothpaste.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com
Subject: Re: [PATCH v2 06/35] brcmfmac: firmware: Support passing in multiple
 board_types

On 1/4/2022 8:26 AM, Hector Martin wrote:
> In order to make use of the multiple alt_path functionality, change
> board_type to an array. Bus drivers can pass in a NULL-terminated list
> of board type strings to try for the firmware fetch.

Reviewed-by: Arend van Spriel <arend.vanspriel@...adcom.com>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Hector Martin <marcan@...can.st>
> ---
>   .../broadcom/brcm80211/brcmfmac/firmware.c    | 35 ++++++++++++-------
>   .../broadcom/brcm80211/brcmfmac/firmware.h    |  2 +-
>   .../broadcom/brcm80211/brcmfmac/pcie.c        |  4 ++-
>   .../broadcom/brcm80211/brcmfmac/sdio.c        |  2 +-
>   4 files changed, 27 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> index 7570dbf22cdd..054ea3ed133e 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> @@ -594,28 +594,39 @@ static int brcmf_fw_complete_request(const struct firmware *fw,
>   	return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret;
>   }
>   
> -static int brcm_alt_fw_paths(const char *path, const char *board_type,
> +static int brcm_alt_fw_paths(const char *path, struct brcmf_fw *fwctx,
>   			     const char *alt_paths[BRCMF_FW_MAX_ALT_PATHS])
>   {
> +	const char **board_types = fwctx->req->board_types;
> +	unsigned int i;
>   	char alt_path[BRCMF_FW_NAME_LEN];
>   	const char *suffix;

[...]

> +	for (i = 0; i < BRCMF_FW_MAX_ALT_PATHS; i++) {
> +		if (!board_types[i])
> +		    break;
>   
> -	strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
> -	strlcat(alt_path, board_type, BRCMF_FW_NAME_LEN);
> -	strlcat(alt_path, suffix, BRCMF_FW_NAME_LEN);
> +		/* strip extension at the end */
> +		strscpy(alt_path, path, BRCMF_FW_NAME_LEN);
> +		alt_path[suffix - path] = 0;
>   
> -	alt_paths[0] = kstrdup(alt_path, GFP_KERNEL);
> +		strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
> +		strlcat(alt_path, board_types[i], BRCMF_FW_NAME_LEN);
> +		strlcat(alt_path, suffix, BRCMF_FW_NAME_LEN);
> +
> +		alt_paths[i] = kstrdup(alt_path, GFP_KERNEL);
> +		brcmf_dbg(TRACE, "FW alt path: %s\n", alt_paths[i]);

Could use alt_path in the debug print thus avoiding additional array 
access (working hard to find those nits to pick ;-) ).

> +	}

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