linux-kernel - Re: [PATCH v7 4/8] firmware: Add new platform fallback mechanism and firmware_request

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Message-ID: <20191011152920.GQ16384@42.do-not-panic.com>
Date:   Fri, 11 Oct 2019 15:29:20 +0000
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Jonathan Corbet <corbet@....net>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Peter Jones <pjones@...hat.com>,
        Dave Olsthoorn <dave@...aar.me>, x86@...nel.org,
        platform-driver-x86@...r.kernel.org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-input@...r.kernel.org
Subject: Re: [PATCH v7 4/8] firmware: Add new platform fallback mechanism and
 firmware_request_platform()

On Fri, Oct 04, 2019 at 04:50:52PM +0200, Hans de Goede wrote:
> diff --git a/drivers/base/firmware_loader/Makefile b/drivers/base/firmware_loader/Makefile
> index 0b2dfa6259c9..fec75895faae 100644
> --- a/drivers/base/firmware_loader/Makefile
> +++ b/drivers/base/firmware_loader/Makefile
> @@ -3,7 +3,7 @@
>  
>  obj-$(CONFIG_FW_LOADER_USER_HELPER) += fallback_table.o
>  obj-$(CONFIG_FW_LOADER)	+= firmware_class.o
> -firmware_class-objs := main.o
> +firmware_class-objs := main.o fallback_platform.o
>  firmware_class-$(CONFIG_FW_LOADER_USER_HELPER) += fallback.o

Why not just:

firmware_class-$(CONFIG_EFI_EMBEDDED_FIRMWARE) += fallback_platform.o

>  obj-y += builtin/
> diff --git a/drivers/base/firmware_loader/fallback.h b/drivers/base/firmware_loader/fallback.h
> index 21063503e4ea..c4350f2e7cc2 100644
> --- a/drivers/base/firmware_loader/fallback.h
> +++ b/drivers/base/firmware_loader/fallback.h
> @@ -66,4 +66,6 @@ static inline void unregister_sysfs_loader(void)
>  }
>  #endif /* CONFIG_FW_LOADER_USER_HELPER */
>  
> +int firmware_fallback_platform(struct fw_priv *fw_priv, enum fw_opt opt_flags);
> +

Inline this if not defined.

>  #endif /* __FIRMWARE_FALLBACK_H */
> diff --git a/drivers/base/firmware_loader/fallback_platform.c b/drivers/base/firmware_loader/fallback_platform.c
> new file mode 100644
> index 000000000000..7e9d730e36bf
> --- /dev/null
> +++ b/drivers/base/firmware_loader/fallback_platform.c
> @@ -0,0 +1,33 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/efi_embedded_fw.h>
> +#include <linux/property.h>
> +#include <linux/security.h>
> +#include <linux/vmalloc.h>
> +
> +#include "fallback.h"
> +#include "firmware.h"
> +
> +int firmware_fallback_platform(struct fw_priv *fw_priv, enum fw_opt opt_flags)
> +{
> +#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE

And we can do away with this eyesore.

Otherwise looks good!

  Luis