linux-kernel - Re: [PATCH] ssb: Fix error return in ssb_bus

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Date:   Wed, 21 Oct 2020 11:47:06 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Jing Xiangfeng <jingxiangfeng@...wei.com>, m@...s.ch
Cc:     linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ssb: Fix error return in ssb_bus_scan()

On 10/21/20 2:33 AM, Jing Xiangfeng wrote:
> Fix to return error code -EINVAL from the error handling case instead
> of 0.
> 
> Signed-off-by: Jing Xiangfeng <jingxiangfeng@...wei.com>
> ---
>   drivers/ssb/scan.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
> index f49ab1aa2149..4161e5d1f276 100644
> --- a/drivers/ssb/scan.c
> +++ b/drivers/ssb/scan.c
> @@ -325,6 +325,7 @@ int ssb_bus_scan(struct ssb_bus *bus,
>   	if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
>   		pr_err("More than %d ssb cores found (%d)\n",
>   		       SSB_MAX_NR_CORES, bus->nr_devices);
> +		err = -EINVAL;
>   		goto err_unmap;
>   	}
>   	if (bus->bustype == SSB_BUSTYPE_SSB) {
> 

You misread the code. The current version is returning -ENOMEM, not 0 for this 
error. Returning -EINVAL could be regarded as as better value; however, this 
error is not likely to appear and it does not make much difference!

In any case, the commit message is wrong. NACK.

Larry