linux-kernel - Re: [PATCH v4 27/27] IB/Verbs: Cleanup rdma_node_get

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Message-ID: <552FBCF4.2070105@profitbricks.com>
Date:	Thu, 16 Apr 2015 15:45:24 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Hal Rosenstock <hal@....mellanox.co.il>
CC:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Ira Weiny <ira.weiny@...el.com>, Tom Talpey <tom@...pey.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v4 27/27] IB/Verbs: Cleanup rdma_node_get_transport()



On 04/16/2015 03:42 PM, Hal Rosenstock wrote:
> On 4/16/2015 9:41 AM, Michael Wang wrote:
>>
>>
>> On 04/16/2015 03:36 PM, Hal Rosenstock wrote:
>> [snip]
>>>> -EXPORT_SYMBOL(rdma_node_get_transport);
>>>> -
>>>>  enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
>>>>  {
>>>>  	if (device->get_link_layer)
>>>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>>>> index 262bf44..f9ef479 100644
>>>> --- a/include/rdma/ib_verbs.h
>>>> +++ b/include/rdma/ib_verbs.h
>>>> @@ -84,9 +84,6 @@ enum rdma_transport_type {
>>>>  	RDMA_TRANSPORT_IBOE,
>>>>  };
>>>>  
>>>> -__attribute_const__ enum rdma_transport_type
>>>> -rdma_node_get_transport(enum rdma_node_type node_type);
>>>> -
>>>>  enum rdma_link_layer {
>>>>  	IB_LINK_LAYER_UNSPECIFIED,
>>>
>>> Is IB_LINK_LAYER_UNSPECIFIED still possible ?
>>
>> Actually it's impossible in kernel at first, all those who implemented the callback
>> won't return UNSPECIFIED, others all have the correct transport type (otherwise BUG())
>> and won't result UNSPECIFIED :-)
> 
> Should it be removed from this enum somewhere in this patch series
> (perhaps early on) ?

It was still directly used by helper like ib_modify_qp_is_ok() as indicator, may be
better in another following patch to reform those part :-)

Regards,
Michael Wang

> 
> -- Hal
> 
>> Regards,
>> Michael Wang
>>
>>>
>>>>  	IB_LINK_LAYER_INFINIBAND,
>>
> 
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