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Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset function registration

From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset function registration
Date 2015-10-19 15:10 +0200
Message-ID <qlimn-5hD-27@gated-at.bofh.it> (permalink)
References <qkYGZ-1JA-7@gated-at.bofh.it> <qkYH1-1JA-31@gated-at.bofh.it>
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On Sunday 18 October 2015 18:00:13 Eric Auger wrote:
> diff --git a/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c b/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
> index 619dc7d..4f76b17 100644
> --- a/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
> +++ b/drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c
> @@ -29,8 +29,7 @@
>  #define DRIVER_VERSION  "0.1"
>  #define DRIVER_AUTHOR   "Eric Auger <eric.auger@linaro.org>"
>  #define DRIVER_DESC     "Reset support for Calxeda xgmac vfio platform device"
> -
> -#define CALXEDAXGMAC_COMPAT "calxeda,hb-xgmac"
> +#define COMPAT		"calxeda,hb-xgmac"

Why the rename?

>  /* XGMAC Register definitions */
>  #define XGMAC_CONTROL           0x00000000      /* MAC Configuration */
> @@ -80,6 +79,43 @@ int vfio_platform_calxedaxgmac_reset(struct vfio_platform_device *vdev)
>  }
>  EXPORT_SYMBOL_GPL(vfio_platform_calxedaxgmac_reset);
>  
> +static int __init vfio_platform_calxedaxgmac_init(void)
> +{
> +	int (*register_reset)(struct module *, char*,
> +				vfio_platform_reset_fn_t);
> +	int ret;
> +
> +	register_reset = symbol_get(vfio_platform_register_reset);
> +	if (!register_reset)
> +		return -EINVAL;

I don't understand what you do the symbol_get() here for.
Why not just call that function directly?

> +	ret = register_reset(THIS_MODULE, COMPAT,
> +	vfio_platform_calxedaxgmac_reset);

This is whitespace damaged, the second line needs to be indented
to the opening braces.

I would also suggest defining register_reset as a macro that
implicitly passes the THIS_MODULE argument, as other subsystems
do.

	Arnd
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Thread

[PATCH 0/4] VFIO platform reset module rework Eric Auger <eric.auger@linaro.org> - 2015-10-18 18:10 +0200
  [PATCH 4/4] vfio: platform: use list of registered reset function Eric Auger <eric.auger@linaro.org> - 2015-10-18 18:10 +0200
  [PATCH 3/4] vfio: platform: add compat in vfio_platform_device Eric Auger <eric.auger@linaro.org> - 2015-10-18 18:10 +0200
  [PATCH 1/4] vfio: platform: add capability to register a reset function Eric Auger <eric.auger@linaro.org> - 2015-10-18 18:10 +0200
    Re: [PATCH 1/4] vfio: platform: add capability to register a reset function Arnd Bergmann <arnd@arndb.de> - 2015-10-19 15:10 +0200
    Re: [PATCH 1/4] vfio: platform: add capability to register a reset  function Alex Williamson <alex.williamson@redhat.com> - 2015-10-19 21:50 +0200
      Re: [PATCH 1/4] vfio: platform: add capability to register a reset  function Eric Auger <eric.auger@linaro.org> - 2015-10-20 19:50 +0200
  [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset function registration Eric Auger <eric.auger@linaro.org> - 2015-10-18 18:10 +0200
    Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset function registration Arnd Bergmann <arnd@arndb.de> - 2015-10-19 15:10 +0200
      Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset  function registration Eric Auger <eric.auger@linaro.org> - 2015-10-19 15:20 +0200
        Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset function registration Arnd Bergmann <arnd@arndb.de> - 2015-10-19 15:30 +0200
          Re: [PATCH 2/4] vfio: platform: reset: calxedaxgmac: add reset  function registration Eric Auger <eric.auger@linaro.org> - 2015-10-19 15:40 +0200
  Re: [PATCH 0/4] VFIO platform reset module rework Arnd Bergmann <arnd@arndb.de> - 2015-10-19 15:10 +0200

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