linux-kernel - Re: [PATCH rdma-next v1 1/3] RDMA/core: Modify rdma_query

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Date:   Thu, 9 Dec 2021 20:17:11 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Avihai Horon <avihaih@...dia.com>, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, Mark Zhang <markzhang@...dia.com>
Subject: Re: [PATCH rdma-next v1 1/3] RDMA/core: Modify rdma_query_gid() to
 return accurate error codes

On Thu, Dec 09, 2021 at 03:16:05PM +0200, Leon Romanovsky wrote:
> From: Avihai Horon <avihaih@...dia.com>
> 
> Modify rdma_query_gid() to return -ENOENT for empty entries. This will
> make error reporting more accurate and will be used in next patches.
> 
> Signed-off-by: Avihai Horon <avihaih@...dia.com>
> Reviewed-by: Mark Zhang <markzhang@...dia.com>
> Signed-off-by: Leon Romanovsky <leonro@...dia.com>
> ---
>  drivers/infiniband/core/cache.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
> index 0c98dd3dee67..edddcca62ece 100644
> --- a/drivers/infiniband/core/cache.c
> +++ b/drivers/infiniband/core/cache.c
> @@ -955,7 +955,7 @@ int rdma_query_gid(struct ib_device *device, u32 port_num,
>  {
>  	struct ib_gid_table *table;
>  	unsigned long flags;
> -	int res = -EINVAL;
> +	int res;
>  
>  	if (!rdma_is_port_valid(device, port_num))
>  		return -EINVAL;
> @@ -963,9 +963,15 @@ int rdma_query_gid(struct ib_device *device, u32 port_num,
>  	table = rdma_gid_table(device, port_num);
>  	read_lock_irqsave(&table->rwlock, flags);
>  
> -	if (index < 0 || index >= table->sz ||
> -	    !is_gid_entry_valid(table->data_vec[index]))
> +	if (index < 0 || index >= table->sz) {
> +		res = -EINVAL

Jason,

I made stupid mistake here, and missed ";".
Can you fix it locally?

Thanks

>  		goto done;
> +	}
> +
> +	if (!is_gid_entry_valid(table->data_vec[index])) {
> +		res = -ENOENT;
> +		goto done;
> +	}
>  
>  	memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid));
>  	res = 0;
> -- 
> 2.33.1
>