netdev - Re: [PATCH] isa-skelton: Remove a wrong netif_wake

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Date:	Fri, 26 Feb 2010 12:03:47 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
CC:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>
Subject: Re: [PATCH] isa-skelton: Remove a wrong netif_wake_queue() call

On 02/24/2010 11:00 AM, Atsushi Nemoto wrote:
> The netif_wake_queue() is called correctly (i.e. only on !txfull
> condition) from net_tx().  So Unconditional call to the
> netif_wake_queue() here is wrong.  This might cause calling of
> start_xmit routine on txfull state and trigger tx-ring overflow.
>
> This fix is ported from commit 662a96bd6f020782dfbdc0d0bd177c7dbb556687.
>
> Signed-off-by: Atsushi Nemoto<anemo@....ocn.ne.jp>
> ---
>   drivers/net/isa-skeleton.c |    1 -
>   1 files changed, 0 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/isa-skeleton.c b/drivers/net/isa-skeleton.c
> index 04d0502..3f33c90 100644
> --- a/drivers/net/isa-skeleton.c
> +++ b/drivers/net/isa-skeleton.c
> @@ -536,7 +536,6 @@ static irqreturn_t net_interrupt(int irq, void *dev_id)
>   		/* Transmit complete. */
>   		net_tx(dev);
>   		np->stats.tx_packets++;
> -		netif_wake_queue(dev);
>   	}
>   #endif

I would suggest deleting this "driver" entirely...  Any new drivers 
remotely like ISA would use the platform API and look more like a PCI 
driver.

	Jeff



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