linux-kernel - Re: [RFC PATCH 08/11] IB/Verbs: Use management helper has

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Date:	Mon, 30 Mar 2015 18:21:55 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Doug Ledford <dledford@...hat.com>
CC:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Ira Weiny <ira.weiny@...el.com>, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org, "J. Bruce Fields" <bfields@...ldses.org>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	"David S. Miller" <davem@...emloft.net>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Moni Shoua <monis@...lanox.com>,
	PJ Waskiewicz <pj.waskiewicz@...idfire.com>,
	Tatyana Nikolova <Tatyana.E.Nikolova@...el.com>,
	Yan Burman <yanb@...lanox.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Bart Van Assche <bvanassche@....org>,
	Yann Droneaud <ydroneaud@...eya.com>,
	Colin Ian King <colin.king@...onical.com>,
	Majd Dibbiny <majd@...lanox.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Matan Barak <matanb@...lanox.com>,
	Alex Estrin <alex.estrin@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Erez Shitrit <erezsh@...lanox.com>,
	Sagi Grimberg <sagig@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Shachar Raindel <raindel@...lanox.com>,
	Mike Marciniszyn <mike.marciniszyn@...el.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Tom Tucker <tom@....us>, Chuck Lever <chuck.lever@...cle.com>
Subject: Re: [RFC PATCH 08/11] IB/Verbs: Use management helper has_iwarp()
 for, iwarp-check

On 03/30/2015 06:13 PM, Doug Ledford wrote:
> On Fri, 2015-03-27 at 16:47 +0100, Michael Wang wrote:
>> Introduce helper has_iwarp() to help us check if an IB device
>> support IWARP protocol.
> This is a needless redirection.  Just stick with the original
> rdma_transport_is_iwarp().

Agree, will leave it there :-)

Regards,
Michael Wang

>
>> Cc: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
>> Cc: Doug Ledford <dledford@...hat.com>
>> Cc: Ira Weiny <ira.weiny@...el.com>
>> Cc: Sean Hefty <sean.hefty@...el.com>
>> Signed-off-by: Michael Wang <yun.wang@...fitbricks.com>
>> ---
>>  include/rdma/ib_verbs.h                 | 13 +++++++++++++
>>  net/sunrpc/xprtrdma/svc_rdma_recvfrom.c |  2 +-
>>  2 files changed, 14 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>> index e796104..0ef9cd7 100644
>> --- a/include/rdma/ib_verbs.h
>> +++ b/include/rdma/ib_verbs.h
>> @@ -1836,6 +1836,19 @@ static inline int has_mcast(struct ib_device *device)
>>  }
>>  
>>  /**
>> + * has_iwarp - Check if a device support IWARP protocol.
>> + *
>> + * @device: Device to be checked
>> + *
>> + * Return 0 when a device has none port to support
>> + * IWARP protocol.
>> + */
>> +static inline int has_iwarp(struct ib_device *device)
>> +{
>> +    return rdma_transport_is_iwarp(device);
>> +}
>> +
>> +/**
>>   * cap_smi - Check if the port of device has the capability
>>   * Subnet Management Interface.
>>   *
>> diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
>> index a7b5891..48aeb5e 100644
>> --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
>> +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
>> @@ -118,7 +118,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp,
>>  
>>  static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count)
>>  {
>> -    if (rdma_transport_is_iwarp(xprt->sc_cm_id->device))
>> +    if (has_iwarp(xprt->sc_cm_id->device))
>>          return 1;
>>      else
>>          return min_t(int, sge_count, xprt->sc_max_sge);
>

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