linux-kernel - Re: Re: [PATCH v2 1/2] drivers: net: ethernet: 3com: fix return value

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Date:   Sun, 25 Dec 2016 01:30:20 +0100
From:   Thomas Preisner <thomas.preisner+linux@....de>
To:     sergei.shtylyov@...entembedded.com
Cc:     dave@...dillows.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kernel@...cs.fau.de,
        milan.stephan+linux@....de, thomas.preisner+linux@....de
Subject: Re: Re: [PATCH v2 1/2] drivers: net: ethernet: 3com: fix return value

Hello.

On Sat, 2016-12-24 at 20:06 +0100, Sergei Shtylyov wrote:
>Hello!
>
>On 12/24/2016 03:02 PM, Thomas Preisner wrote:
>
>> In a few cases the err-variable is not set to a negative error code if a
>> function call fails and thus 0 is returned instead.
>> It may be better to set err to the appropriate negative error code
>> before returning.
>>
>> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188841
>>
>> Reported-by: Pan Bian <bianpan2016@....com>
>> Signed-off-by: Thomas Preisner <thomas.preisner+linux@....de>
>> Signed-off-by: Milan Stephan <milan.stephan+linux@....de>
>> ---
>>  drivers/net/ethernet/3com/typhoon.c | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/3com/typhoon.c b/drivers/net/ethernet/3com/typhoon.c
>> index a0cacbe..c88b88a 100644
>> --- a/drivers/net/ethernet/3com/typhoon.c
>> +++ b/drivers/net/ethernet/3com/typhoon.c
>[...]
>> @@ -2411,7 +2412,8 @@ typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>>  	 * later when we print out the version reported.
>>  	 */
>>  	INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
>> -	if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) {
>> +	err = typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp);
>> +	if(err < 0) {
>
>    Need a space between *if* and (. Run your patches thru 
>scripts/checkpatch.pl before posting, please.

Those spaces were actually left out purposely: The file in question (typhoon.c)
is missing those spaces between the statements (if, for, while) and the
following opening bracket pretty much always (except 2-3 times) and we figured
that it might be better to keep the coding style consistent since this might
aswell have been intended by the original author.

>
>>  		err_msg = "Could not get Sleep Image version";
>>  		goto error_out_reset;
>>  	}
>> @@ -2453,7 +2455,8 @@ typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>>  	dev->features = dev->hw_features |
>>  		NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_RXCSUM;
>>
>> -	if(register_netdev(dev) < 0) {
>> +	err = register_netdev(dev);
>> +	if(err < 0) {
>
>    Same here.
>
>[...]
>
>MBR, Sergei

But of course we can provide you with a patchset including those spaces.

With Regards,
Milan and Thomas