netdev - Re: [PATCH net-next 07/16] sfc: Limit scope of a Falcon A1 IRQ workaround

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Date:	Mon, 26 Aug 2013 16:31:37 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-net-drivers@...arflare.com
Subject: Re: [PATCH net-next 07/16] sfc: Limit scope of a Falcon A1 IRQ workaround

Hello.

On 26-08-2013 3:03, Ben Hutchings wrote:

> We unconditionally acknowledge legacy interrupts just before disabling
> them.  This workaround is needed on Falcon A1 but probably not on
> later chips where the legacy interrupt mechanism is different.  It was
> also originally done after the IRQ handler was removed, not before.
> Restore the original behaviour for Falcon A1 only by doing this
> acknowledgement in the efx_nic_type::fini operation.

> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
> ---
>   drivers/net/ethernet/sfc/falcon.c |    4 ++--
>   drivers/net/ethernet/sfc/nic.c    |    7 -------
>   drivers/net/ethernet/sfc/nic.h    |    1 -
>   3 files changed, 2 insertions(+), 10 deletions(-)

> diff --git a/drivers/net/ethernet/sfc/falcon.c b/drivers/net/ethernet/sfc/falcon.c
> index f8de382..4492129 100644
> --- a/drivers/net/ethernet/sfc/falcon.c
> +++ b/drivers/net/ethernet/sfc/falcon.c
> @@ -336,7 +336,7 @@ static void falcon_prepare_flush(struct efx_nic *efx)
>    *
>    * NB most hardware supports MSI interrupts
>    */
> -inline void falcon_irq_ack_a1(struct efx_nic *efx)
> +static inline void falcon_irq_ack_a1(struct efx_nic *efx)

    Does inline make sense still when this now is referenced indirectly?

>   {
>   	efx_dword_t reg;
>
> @@ -2343,7 +2343,7 @@ const struct efx_nic_type falcon_a1_nic_type = {
>   	.remove = falcon_remove_nic,
>   	.init = falcon_init_nic,
>   	.dimension_resources = falcon_dimension_resources,
> -	.fini = efx_port_dummy_op_void,
> +	.fini = falcon_irq_ack_a1,
>   	.monitor = falcon_monitor,
>   	.map_reset_reason = falcon_map_reset_reason,
>   	.map_reset_flags = falcon_map_reset_flags,

WBR, Sergei

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