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From: Dennis Dalessandro <dennis.dalessandro@intel.com>
To: Nathan Chancellor <natechancellor@gmail.com>,
	Mike Marciniszyn <mike.marciniszyn@intel.com>,
	Doug Ledford <dledford@redhat.com>,
	Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
	clang-built-linux@googlegroups.com
Subject: Re: [PATCH] IB/hfi1: Add explicit cast OPA_MTU_8192 to 'enum ib_mtu'
Date: Wed, 24 Jun 2020 14:22:08 -0400	[thread overview]
Message-ID: <5f98c547-1bac-bb05-1c75-cefb8616964a@intel.com> (raw)
In-Reply-To: <20200623005224.492239-1-natechancellor@gmail.com>

On 6/22/2020 8:52 PM, Nathan Chancellor wrote:
> Clang warns:
> 
> drivers/infiniband/hw/hfi1/qp.c:198:9: warning: implicit conversion from
> enumeration type 'enum opa_mtu' to different enumeration type 'enum
> ib_mtu' [-Wenum-conversion]
>                  mtu = OPA_MTU_8192;
>                      ~ ^~~~~~~~~~~~
> 1 warning generated.
> 
> enum opa_mtu extends enum ib_mtu. There are typically two ways to deal
> with this:
> 
> * Remove the expected types and just use 'int' for all parameters and
>    types.
> 
> * Explicitly cast the enums between each other.
> 
> This driver chooses to do the later so do the same thing here.
> 
> Fixes: 6d72344cf6c4 ("IB/ipoib: Increase ipoib Datagram mode MTU's upper limit")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1062
> Link: https://lore.kernel.org/linux-rdma/20200527040350.GA3118979@ubuntu-s3-xlarge-x86/
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> ---

Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>


  reply	other threads:[~2020-06-24 18:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23  0:52 Nathan Chancellor
2020-06-24 18:22 ` Dennis Dalessandro [this message]
2020-06-30 21:05   ` Nathan Chancellor
2020-07-02 14:26 ` Jason Gunthorpe

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