linux-kernel - Re: [PATCH v4 23/24] fpga: dfl: afu: add user afu sub feature support

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Message-ID: <20180322044156.GB8305@hao-dev>
Date:   Thu, 22 Mar 2018 12:41:56 +0800
From:   Wu Hao <hao.wu@...el.com>
To:     Alan Tull <atull@...nel.org>
Cc:     Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-api@...r.kernel.org, "Kang, Luwei" <luwei.kang@...el.com>,
        "Zhang, Yi Z" <yi.z.zhang@...el.com>,
        Xiao Guangrong <guangrong.xiao@...ux.intel.com>,
        Tim Whisonant <tim.whisonant@...el.com>,
        Enno Luebbers <enno.luebbers@...el.com>,
        Shiva Rao <shiva.rao@...el.com>,
        Christopher Rauer <christopher.rauer@...el.com>
Subject: Re: [PATCH v4 23/24] fpga: dfl: afu: add user afu sub feature support

On Wed, Mar 21, 2018 at 06:50:54PM -0500, Alan Tull wrote:
> On Tue, Mar 20, 2018 at 2:10 AM, Wu Hao <hao.wu@...el.com> wrote:
> 
> >> > +static int afu_mmap(struct file *filp, struct vm_area_struct *vma)
> >> > +{
> >> > +       struct fpga_afu_region region;
> >> > +       struct platform_device *pdev = filp->private_data;
> >> > +       struct feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
> >> > +       u64 size = vma->vm_end - vma->vm_start;
> >> > +       u64 offset;
> >> > +       int ret;
> >> > +
> >> > +       if (!(vma->vm_flags & VM_SHARED))
> >> > +               return -EINVAL;
> >> > +
> >> > +       offset = vma->vm_pgoff << PAGE_SHIFT;
> >> > +       ret = afu_get_region_by_offset(pdata, offset, size, &region);
> 
> Most of the functions here are afu_region_*, but there's also
> afu_get_region_by_*.  Better if afu_region_get_by_* to be consistent.

Agree, will fix it in the next version, thanks a lot for the comments.

Hao