linux-kernel - Re: [PATCH v3 0/4] PCI: Clean up pci-sysfs.c

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Message-ID: <d993838c-310c-60bd-b788-ab669bf08566@redhat.com>
Date:   Fri, 16 Aug 2019 00:22:13 -0400
From:   Don Dutile <ddutile@...hat.com>
To:     Kelsey Skunberg <skunberg.kelsey@...il.com>, bhelgaas@...gle.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     skhan@...uxfoundation.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        bodong@...lanox.com, gregkh@...uxfoundation.org
Subject: Re: [PATCH v3 0/4] PCI: Clean up pci-sysfs.c

On 08/15/2019 11:33 AM, Kelsey Skunberg wrote:
> This series is designed to clean up device attributes and permissions in
> pci-sysfs.c. Then move the sysfs SR-IOV functions from pci-sysfs.c to
> iov.c for better organization.
> 
> Patch 1: Define device attributes with DEVICE_ATTR* instead of __ATTR*.
> 
> Patch 2: Change permissions from symbolic to the preferred octal.
> 
> Patch 3: Change DEVICE_ATTR() with 0220 permissions to DEVICE_ATTR_WO().
> 
> Patch 4: Move sysfs SR-IOV functions to iov.c to keep the feature's code
> together.
> 
> 
> Patch 1, 2, and 4 will report unusual permissions '0664' used from the
> following:
> 
>    static DEVICE_ATTR(sriov_numvfs, 0664, sriov_numvfs_show,
>                       sriov_numvfs_store);
> 
>    static DEVICE_ATTR(sriov_drivers_autoprobe, 0664,
>                       sriov_drivers_autoprobe_show,
>                       sriov_drivers_autoprobe_store);
> 
> This series preserves the existing permissions set in:
> 
> 
>    commit 0e7df22401a3 ("PCI: Add sysfs sriov_drivers_autoprobe to control
>                          VF driver binding")
> 
>    commit 1789382a72a5 ("PCI: SRIOV control and status via sysfs")
> 
> Either adding a comment verifying permissions are okay or changing the
> permissions is to be completed with a new patch.
> 
> Changes since v1:
>          Add patch 1 and 2 to fix the way device attributes are defined
>          and change permissions from symbolic to octal. Patch 4 which moves
>          sysfs SR-IOV functions to iov.c will then apply cleaner.
> 
> Changes since v2:
> 
>          Patch 1: Commit log updated. Example shows DEVICE_ATTR_RO()
>          example instead of DEVICE_ATTR(). DEVICE_ATTR() should be avoided
>          unless the files have unusual permissions. Changed to reflect a
>          more encouraged usage.  Also updated regex to be accurate.
> 
>          Patch 3: [NEW] Add patch to change DEVICE_ATTR() with 0220
>          permissions to DEVICE_ATTR_WO().
> 
>          Updated series log to reflect new patch and unusual permissions
>          information.
> 
> 
> Kelsey Skunberg (4):
>    PCI: sysfs: Define device attributes with DEVICE_ATTR*
>    PCI: sysfs: Change permissions from symbolic to octal
>    PCI: sysfs: Change DEVICE_ATTR() to DEVICE_ATTR_WO()
>    PCI/IOV: Move sysfs SR-IOV functions to iov.c
> 
>   drivers/pci/iov.c       | 168 ++++++++++++++++++++++++++++++
>   drivers/pci/pci-sysfs.c | 223 ++++------------------------------------
>   drivers/pci/pci.h       |   2 +-
>   3 files changed, 191 insertions(+), 202 deletions(-)
> 
Thanks for the cleanup.

Reviewed-by: Donald Dutile <ddutile@...hat.com>