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From: Gal Pressman <galpress@amazon.com>
To: Leon Romanovsky <leonro@nvidia.com>
Cc: Avihai Horon <avihaih@nvidia.com>,
	Maor Gottlieb <maorg@nvidia.com>,
	Jason Gunthorpe <jgg@nvidia.com>, <linux-rdma@vger.kernel.org>,
	"Leybovich, Yossi" <sleybo@amazon.com>
Subject: Re: New GID query API broke EFA
Date: Thu, 22 Oct 2020 14:49:32 +0300	[thread overview]
Message-ID: <b3eeb7ea-17f7-7a57-aa56-4b19e54a8088@amazon.com> (raw)
In-Reply-To: <20201022112100.GE2611066@unreal>

On 22/10/2020 14:21, Leon Romanovsky wrote:
> On Thu, Oct 22, 2020 at 01:58:29PM +0300, Gal Pressman wrote:
>> Hi all,
>>
>> The new IOCTL query GID API 9f85cbe50aa0 ("RDMA/uverbs: Expose the new GID query
>> API to user space") currently breaks EFA, as ibv_query_gid() no longer works.
>>
>> The problem is that the IOCTL call checks for:
>>       if (!rdma_ib_or_roce(ib_dev, port_num))
>>               return -EOPNOTSUPP;
>>
>> EFA is neither of these, but it uses GIDs.
>>
>> Any objections to remove the check? Any other solutions come to mind?
> 
> We added this check to protect access to rdma_get_gid_attr() for devices
> without GID table.
>  1234         table = rdma_gid_table(device, port_num);
>  1235         if (index < 0 || index >= table->sz)
>  1236                 return ERR_PTR(-EINVAL);
> 
> So you can extend that function to return for table == NULL an error and
> remove rdma_ib_or_roce()

Thanks Leon, I will send a patch.

  reply	other threads:[~2020-10-22 11:49 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-22 10:58 New GID query API broke EFA Gal Pressman
2020-10-22 11:21 ` Leon Romanovsky
2020-10-22 11:49   ` Gal Pressman [this message]
2020-10-22 12:10   ` Jason Gunthorpe
2020-10-22 12:12     ` Gal Pressman
2020-10-22 12:15       ` Gal Pressman
2020-10-22 12:23         ` Leon Romanovsky
2020-10-22 12:23     ` Leon Romanovsky
2020-10-22 16:37       ` Jason Gunthorpe

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