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SubjectRe: [PATCH v4 01/18] fpga: bridge: support getting bridge from device
On Thu, Sep 14, 2017 at 03:29:09PM -0700, matthew.gerlach@linux.intel.com wrote:
>
>
> On Thu, 14 Sep 2017, Alan Tull wrote:
>
> > On Wed, Sep 13, 2017 at 6:38 PM, <matthew.gerlach@linux.intel.com> wrote:
> >
> > Hi Matthew,
> >
> > >
> > > Hi Alan,
> > >
> > > Two minor nits below.
> > >
> > > Matthew Gerlach
> > >
> > > On Wed, 13 Sep 2017, Alan Tull wrote:
> > >
> > > > Add two functions for getting the FPGA bridge from the device
> > > > rather than device tree node. This is to enable writing code
> > > > that will support using FPGA bridges without device tree.
> > > > Rename one old function to make it clear that it is device
> > > > tree-ish. This leaves us with 3 functions for getting a bridge:
> > > >
> > > > * fpga_bridge_get
> > > > Get the bridge given the device.
> > > >
> > > > * fpga_bridges_get_to_list
> > > > Given the device, get the bridge and add it to a list.
> > > >
> > > > * of_fpga_bridges_get_to_list
> > > > Renamed from priviously existing fpga_bridges_get_to_list.
> > > > Given the device node, get the bridge and add it to a list.
> > > >
> > > > Signed-off-by: Alan Tull <atull@kernel.org>
> > > > ---
> > > > v2: use list_for_each_entry
> > > > static the bridge_list_lock
> > > > update copyright and author email
> > > > v3: no change to this patch in this version of patchset
> > > > v4: no change to this patch in this version of patchset
> > > > ---
> > > > drivers/fpga/fpga-bridge.c | 110
> > > > +++++++++++++++++++++++++++++++--------
> > > > drivers/fpga/fpga-region.c | 11 ++--
> > > > include/linux/fpga/fpga-bridge.h | 7 ++-
> > > > 3 files changed, 100 insertions(+), 28 deletions(-)
> > > >
> > > > diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
> > > > index fcd2bd3..af6d97e 100644
> > > > --- a/drivers/fpga/fpga-bridge.c
> > > > +++ b/drivers/fpga/fpga-bridge.c
> > > > @@ -2,6 +2,7 @@
> > > > * FPGA Bridge Framework Driver
> > > > *
> > > > * Copyright (C) 2013-2016 Altera Corporation, All Rights Reserved.
> > > > + * Copyright (C) 2017 Intel Corporation
> > > > *
> > > > * This program is free software; you can redistribute it and/or modify it
> > > > * under the terms and conditions of the GNU General Public License,
> > > > @@ -70,29 +71,12 @@ int fpga_bridge_disable(struct fpga_bridge *bridge)
> > > > }
> > > > EXPORT_SYMBOL_GPL(fpga_bridge_disable);
> > > >
> > > > -/**
> > > > - * of_fpga_bridge_get - get an exclusive reference to a fpga bridge
> > > > - *
> > > > - * @np: node pointer of a FPGA bridge
> > > > - * @info: fpga image specific information
> > > > - *
> > > > - * Return fpga_bridge struct if successful.
> > > > - * Return -EBUSY if someone already has a reference to the bridge.
> > > > - * Return -ENODEV if @np is not a FPGA Bridge.
> > > > - */
> > > > -struct fpga_bridge *of_fpga_bridge_get(struct device_node *np,
> > > > - struct fpga_image_info *info)
> > > > -
> > > > +struct fpga_bridge *__fpga_bridge_get(struct device *dev,
> > > > + struct fpga_image_info *info)
> > >
> > >
> > > Should this be a static function?
> >
> > You are right. Will fix in v5.
> >
> > >
> > > I was recently told by mtd maintainers that function names prefixed with
> > > __ should be avoided.
> >
> > I see functions named thusly around in the kernel. Can you point me
> > to that thread or let me know what their thinking was about this? I
> > am open for suggestions for a new function name.
>
> Marek Vasut just told me to "Avoid function names with __ prefix" in
>
> https://patchwork.kernel.org/patch/9883977/
>
> I tend to agree with you that the __ prefix seems to be around, but
> this could be a case of "evolution" of coding style. Historically,
> __ seems to mean an internal version of an external function. If __
> is to be avoided, we might have to rename to fpga_bridge_get_internal().

Bear in mind that coding style can be subsystem specific. What applies
to MTD doesn't necessarily have to apply here.

>
> >
> > Alan
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-fpga" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> >
>

Thanks,
Moritz

PS: I'm travelling this week, will get around to reviews next week

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