Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <79ec60974875d4ac17589ea4575e36ec1204f881.camel@gmail.com>
Subject: Re: [PATCH v1 2/2] mmc: cavium: Remove redundant if-statement
 checkup
From:   Bean Huo <huobean@gmail.com>
To:     Ulf Hansson <ulf.hansson@linaro.org>
Cc:     rric@kernel.org, Linus Walleij <linus.walleij@linaro.org>,
        linux-mmc <linux-mmc@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "Bean Huo (beanhuo)" <beanhuo@micron.com>,
        "# 4.0+" <stable@vger.kernel.org>
Date:   Fri, 19 Mar 2021 16:42:37 +0100
In-Reply-To: <CAPDyKFrU591aeH5GyuuQW8tPeNc9wav=t8wqF1EdTBbCc9xheg@mail.gmail.com>
References: <20210319121357.255176-1-huobean@gmail.com>
         <20210319121357.255176-3-huobean@gmail.com>
         <CAPDyKFrU591aeH5GyuuQW8tPeNc9wav=t8wqF1EdTBbCc9xheg@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.36.4-0ubuntu1 
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Fri, 2021-03-19 at 15:09 +0100, Ulf Hansson wrote:
> On Fri, 19 Mar 2021 at 13:14, Bean Huo <huobean@gmail.com> wrote:
> 
> > From: Bean Huo <beanhuo@micron.com>
> > Currently, we have two ways to issue multiple-block read/write the
> > command to the eMMC. One is by normal IO request path fs->block-
> > >mmc.
> > Another one is that we can issue multiple-block read/write through
> > MMC ioctl interface. For the first path, mrq->stop, and mrq->stop-
> > >opcode
> > will be initialized in mmc_blk_data_prep(). However, for the second
> > IO
> > path, mrq->stop is not initialized since it is a pre-defined
> > multiple
> > blocks read/write.
> 
> 
> As a matter of fact this way is also supported for the regular block
> 
> I/O path. To make the mmc block driver to use it, mmc host drivers
> 
> need to announce that it's supported by setting MMC_CAP_CMD23.
> 
> 
> 
> It looks like that is what your patch should be targeted towards, can
> 
> you have a look at this instead?
> 
> 

Hi Ulf,
Thanks for your comments. I will look at that as your suggestion.
The patch [1/2] is accepted, so I will just update this patch to
the next version.

Kind regards,
Bean

> 
> Kind regards
> 
> Uffe