linux-kernel - Re: [patch v3] drivers/platform/x86: introduce support for Mellanox hotplug driver

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Date:   Sun, 23 Oct 2016 07:47:58 -0700
From:   Darren Hart <dvhart@...radead.org>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Vadim Pasternak <vadimp@...lanox.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "geert@...ux-m68k.org" <geert@...ux-m68k.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>
Subject: Re: [patch v3] drivers/platform/x86: introduce support for Mellanox
 hotplug driver

On Sun, Oct 23, 2016 at 10:23:53AM +0200, Jiri Pirko wrote:
> Sun, Oct 23, 2016 at 08:14:53AM CEST, vadimp@...lanox.com wrote:
> >
> >
> >> -----Original Message-----
> >> From: Darren Hart [mailto:dvhart@...radead.org]
> >> Sent: Friday, October 21, 2016 9:42 PM
> >> To: Vadim Pasternak <vadimp@...lanox.com>
> >> Cc: davem@...emloft.net; geert@...ux-m68k.org; akpm@...ux-
> >> foundation.org; kvalo@...eaurora.org; gregkh@...uxfoundation.org;
> >> mchehab@...nel.org; linux@...ck-us.net; linux-kernel@...r.kernel.org;
> >> platform-driver-x86@...r.kernel.org; jiri@...nulli.us
> >> Subject: Re: [patch v3] drivers/platform/x86: introduce support for Mellanox
> >> hotplug driver
> >> 
> >> On Thu, Oct 20, 2016 at 04:28:01PM +0000, vadimp@...lanox.com wrote:
> >> > From: Vadim Pasternak <vadimp@...lanox.com>
> >> >
> >> > Enable system support for the Mellanox Technologies hotplug platform
> >> > driver, which provides support for the next Mellanox basic systems:
> >> > "msx6710", "msx6720", "msb7700", "msn2700", "msx1410", "msn2410",
> >> > "msb7800", "msn2740", "msn2100" and also various number of derivative
> >> > systems from the above basic types.
> >> > This driver handles hot-plug events for the power suppliers, power
> >> > cables and fans for the above systems.
> >> >
> >> > The Kconfig currently controlling compilation of this code is:
> >> > driver/platform/x86:config MLX_CPLD_PLATFORM
> >> >                        tristate "Mellanox platform hotplug driver support"
> >> >
> >> > Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
> >> > ---
> >> > v1->v2:
> >> >  Comments pointed out by Darren:
> >> >  - remove whitespaces in config;
> >> >  - remove redundant includes for header files;
> >> >  - fix comments styling;
> >> >  - fix register value assignment in mlxcpld_hotplug_attr_show;
> >> >  - mlxcpld_hotplug_attr_init - use local aliases to reduce line
> >> > length;
> >> >  - Add fields description in the struct mlxcpld_hotplug_device;
> >> > v2->v3:
> >> >  Comments pointed out by Darren:
> >> >   - Fix structures and enum comments in mlxcpld-hotplug.c according to
> >> >     Documentation/kernel-documentation.rst guideline;
> >> >   - Assign and mask aggregation status in mlxcpld_hotplug_work_handler on
> >> >     the same line.
> >> >   - Refactor mlxcpld_hotplug_work_handler. Make common helper routine for
> >> >     each attribute type.
> >> >   - Produce error message in case signal is not expected.
> >> >   - Fix header file according to Documentation/kernel-documentation.rst
> >> >     guideline;
> >> 
> >> >  Fix added by Vadim:
> >> > 	Fix re-scheduling flow for possibly missed signals. By mistake it
> >> > 	was coupled with FAN.
> >> 
> >> Thanks Vadim. Merged to for-next for 4.10.
> >> 
> >> Also for 4.10, it would be good to move mlx-platform out of arch/x86/platform
> >> to
> >> drivers/platform/x86 as it isn't an architectural driver. Would you be able to
> >> prepare the patch?
> >
> >Hi Darren,
> >
> >Thank you very much for all your reviews.
> >
> >Sure, I'll prepare the patch.
> >
> >Should it be submitted in two different patches (remove in git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git; and add in
> >git://git.infradead.org/users/dvhart/linux-platform-drivers-x86.git)?
> >Or in one patch, in  git://git.infradead.org/users/dvhart/linux-platform-drivers-x86.git?
> 
> One patch, please.

It needs to be in one patch, yes. Otherwise you would leave the
platform/driver/x86 side missing it's dependencies... it would be a mess.

-- 
Darren Hart
Intel Open Source Technology Center