netdev - Re: [PATCH] netxen: only half timeout waited

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Date:	Tue, 17 Feb 2009 07:33:12 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	dhananjay@...xen.com, netdev@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] netxen: only half timeout waited

On 16-02-2009 14:55, Roel Kluin wrote:
> Only half the timeout was waited, due to the double increment, and an error
> occurred one too early.
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> ---
> diff --git a/drivers/net/netxen/netxen_nic_niu.c b/drivers/net/netxen/netxen_nic_niu.c
> index c3b9c83..df3aa08 100644
> --- a/drivers/net/netxen/netxen_nic_niu.c
> +++ b/drivers/net/netxen/netxen_nic_niu.c
> @@ -147,12 +147,11 @@ int netxen_niu_gbe_phy_read(struct netxen_adapter *adapter, long reg,
>  					  NETXEN_NIU_GB_MII_MGMT_INDICATE(0),
>  					  &status, 4))
>  			return -EIO;
> -		timeout++;
>  	} while ((netxen_get_gb_mii_mgmt_busy(status)
>  		  || netxen_get_gb_mii_mgmt_notvalid(status))
>  		 && (timeout++ < NETXEN_NIU_PHY_WAITMAX));
>  
> -	if (timeout < NETXEN_NIU_PHY_WAITMAX) {
> +	if (timeout <= NETXEN_NIU_PHY_WAITMAX) {

Roel, very good caches, but IMHO in all such cases changing to
++timeout with 'if (timeout == NETXEN_NIU_PHY_WAITMAX)' where
possible, should be really more readable. At least wrt. next similar
patches.

Thanks,
Jarek P.

>  		if (adapter->hw_read_wx(adapter,
>  					  NETXEN_NIU_GB_MII_MGMT_STATUS(0),
>  					  readval, 4))
> @@ -240,11 +239,10 @@ int netxen_niu_gbe_phy_write(struct netxen_adapter *adapter, long reg,
>  					  NETXEN_NIU_GB_MII_MGMT_INDICATE(0),
>  					  &status, 4))
>  			return -EIO;
> -		timeout++;
>  	} while ((netxen_get_gb_mii_mgmt_busy(status))
>  		 && (timeout++ < NETXEN_NIU_PHY_WAITMAX));
>  
> -	if (timeout < NETXEN_NIU_PHY_WAITMAX)
> +	if (timeout <= NETXEN_NIU_PHY_WAITMAX)
>  		result = 0;
>  	else
>  		result = -EIO;
--
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