linux-kernel - Re: [Linux-kernel-mentees] [PATCH] PCI/IOV: Move sysfs SR-IOV functions to iov.c

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Date:   Sat, 10 Aug 2019 15:32:18 -0600
From:   Kelsey Skunberg <skunberg.kelsey@...il.com>
To:     Greg KH <greg@...ah.com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>, linux-pci@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Linux-kernel-mentees] [PATCH] PCI/IOV: Move sysfs SR-IOV
 functions to iov.c

On Sat, Aug 10, 2019 at 07:24:09PM +0200, Greg KH wrote:
> On Sat, Aug 10, 2019 at 12:15:25PM -0500, Bjorn Helgaas wrote:
> > On Sat, Aug 10, 2019 at 09:17:19AM +0200, Greg KH wrote:
> > > On Fri, Aug 09, 2019 at 01:57:21PM -0600, Kelsey Skunberg wrote:
> > > > +static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
> > > 
> > > DEVICE_ATTR_RO() please.  This is a device attribute, not a "raw"
> > > kobject attribute.
> > 
> > This patch is just a move; here's the source of the line above:
> > 
> > > > -static struct device_attribute sriov_totalvfs_attr = __ATTR_RO(sriov_totalvfs);
> > 
> > I certainly support using DEVICE_ATTR_RO() instead of __ATTR_RO(), but
> > that should be down with a separate patch so it's not buried in what
> > is otherwise a simple move.
> > 
> > > > +static struct device_attribute sriov_numvfs_attr =
> > > > +		__ATTR(sriov_numvfs, (S_IRUGO | S_IWUSR | S_IWGRP),
> > > > +		       sriov_numvfs_show, sriov_numvfs_store);
> > > > +static struct device_attribute sriov_offset_attr = __ATTR_RO(sriov_offset);
> > > > +static struct device_attribute sriov_stride_attr = __ATTR_RO(sriov_stride);
> > > > +static struct device_attribute sriov_vf_device_attr =
> > > > +		__ATTR_RO(sriov_vf_device);
> > > > +static struct device_attribute sriov_drivers_autoprobe_attr =
> > > > +		__ATTR(sriov_drivers_autoprobe, (S_IRUGO | S_IWUSR | S_IWGRP),
> > > > +		       sriov_drivers_autoprobe_show,
> > > > +		       sriov_drivers_autoprobe_store);
> > > 
> > > Same for all of these, they should use DEVICE_ATTR* macros.
> > > 
> > > And why the odd permissions on 2 of these files?  Are you sure about
> > > that?
> > 
> > Same for these.  It'd be nice to fix them (and similar cases in
> > pci-sysfs.c, rpadlpar_sysfs.c, sgi_hotplug.c, slot.c) but in a
> > separate patch.
> > 
> > I think Kelsey did the right thing here by not mixing unrelated fixes
> > in with the code move.  A couple additional patches to change the
> > __ATTR() uses and the permissions (git grep "\<S_" finds several
> > possibilities) would be icing on the cake, but getting the SR-IOV
> > code all together is an improvement by itself.
> 
> Ah, ok, that makes more sense.  As long as this is patch 1/X, I'm fine
> with it :)
> 
> thanks,
> 
> greg k-h

I'll set up a series to cover these changes and submit it as a v2. Thank
you for reviewing Greg and Bjorn!

Cheers,
Kelsey