linux-kernel - Re: [PATCH] amd-xgbe: remove h from printk format specifier

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Date:   Wed, 23 Dec 2020 12:33:56 -0800
From:   Tom Rix <trix@...hat.com>
To:     Joe Perches <joe@...ches.com>, thomas.lendacky@....com,
        davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] amd-xgbe: remove h from printk format specifier


On 12/23/20 12:14 PM, Joe Perches wrote:
> On Wed, 2020-12-23 at 11:43 -0800, trix@...hat.com wrote:
>> From: Tom Rix <trix@...hat.com>
>>
>> This change fixes the checkpatch warning described in this commit
>> commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]")
>>
>> Standard integer promotion is already done and %hx and %hhx is useless
>> so do not encourage the use of %hh[xudi] or %h[xudi].
> Why only xgbe-ethtool?
>
> Perhaps your script only converts direct uses of functions
> marked with __printf and not any uses of the same functions
> via macros.

The fixer may have issues.

A works as designed by not desired is it only fixes what it compiles and if a

macro is #if-def away then it will not do the fix.  This is troublesome for the

the *_debug() routines.  So I am rejecting files with partial fixes.

It is also likely I missed adding __printf attributes.

There will be enough changes for this pass through to count as my feat of strength for today.

Tom

> $ git grep -P '%[\w\d\.]*h\w' drivers/net/ethernet/amd/xgbe/
> drivers/net/ethernet/amd/xgbe/xgbe-dcb.c:                         "TC%u: tx_bw=%hhu, rx_bw=%hhu, tsa=%hhu\n", i,
> drivers/net/ethernet/amd/xgbe/xgbe-dcb.c:               netif_dbg(pdata, drv, netdev, "PRIO%u: TC=%hhu\n", i,
> drivers/net/ethernet/amd/xgbe/xgbe-dcb.c:                                 "unsupported TSA algorithm (%hhu)\n",
> drivers/net/ethernet/amd/xgbe/xgbe-dcb.c:                 "cap=%hhu, en=%#hhx, mbc=%hhu, delay=%hhu\n",
> drivers/net/ethernet/amd/xgbe/xgbe-dev.c:       netif_dbg(pdata, drv, pdata->netdev, "VXLAN tunnel id set to %hx\n",
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c:           netdev_err(netdev, "invalid phy address %hhu\n",
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c:           netdev_err(netdev, "unsupported autoneg %hhu\n",
> drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c:                   netdev_err(netdev, "unsupported duplex %hhu\n",
>
>> Signed-off-by: Tom Rix <trix@...hat.com>
>> ---
>>  drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 6 +++---
>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
>> index 61f39a0e04f9..3c18f26bf2a5 100644
>> --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
>> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
>> @@ -339,14 +339,14 @@ static int xgbe_set_link_ksettings(struct net_device *netdev,
>>  	speed = cmd->base.speed;
>>  
>>
>>  	if (cmd->base.phy_address != pdata->phy.address) {
>> -		netdev_err(netdev, "invalid phy address %hhu\n",
>> +		netdev_err(netdev, "invalid phy address %u\n",
>>  			   cmd->base.phy_address);
>>  		return -EINVAL;
>>  	}
>>  
>>
>>  	if ((cmd->base.autoneg != AUTONEG_ENABLE) &&
>>  	    (cmd->base.autoneg != AUTONEG_DISABLE)) {
>> -		netdev_err(netdev, "unsupported autoneg %hhu\n",
>> +		netdev_err(netdev, "unsupported autoneg %u\n",
>>  			   cmd->base.autoneg);
>>  		return -EINVAL;
>>  	}
>> @@ -358,7 +358,7 @@ static int xgbe_set_link_ksettings(struct net_device *netdev,
>>  		}
>>  
>>
>>  		if (cmd->base.duplex != DUPLEX_FULL) {
>> -			netdev_err(netdev, "unsupported duplex %hhu\n",
>> +			netdev_err(netdev, "unsupported duplex %u\n",
>>  				   cmd->base.duplex);
>>  			return -EINVAL;
>>  		}
>