linux-kernel - Re: [PATCH v1] drivers: pci: introduce configurable delay for Rockchip PCIe bus scan

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Message-Id: <CSIJFLM445UI.1W405TTWNZYYU@vincent-arch>
Date:   Wed, 10 May 2023 12:49:45 +0200
From:   "Vincenzo Palazzo" <vincenzopalazzodev@...il.com>
To:     "Greg KH" <greg@...ah.com>
Cc:     <linux-pci@...r.kernel.org>, <robh@...nel.org>, <heiko@...ech.de>,
        <kw@...ux.com>, <shawn.lin@...k-chips.com>,
        <linux-kernel@...r.kernel.org>, <lgirdwood@...il.com>,
        <linux-rockchip@...ts.infradead.org>, <broonie@...nel.org>,
        <bhelgaas@...gle.com>,
        <linux-kernel-mentees@...ts.linuxfoundation.org>,
        <lpieralisi@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        "Dan Johansen" <strit@...jaro.org>
Subject: Re: [PATCH v1] drivers: pci: introduce configurable delay for
 Rockchip PCIe bus scan

> On Tue, May 09, 2023 at 05:39:12PM +0200, Vincenzo Palazzo wrote:
> > --- a/drivers/pci/controller/pcie-rockchip-host.c
> > +++ b/drivers/pci/controller/pcie-rockchip-host.c
> > @@ -38,6 +38,10 @@
> >  #include "../pci.h"
> >  #include "pcie-rockchip.h"
> >
> > +/* bus_scan_delay - module parameter to override the
> > + * device tree value, which is 0 by default. */
> > +static int bus_scan_delay = -1;
>
> Please do not add new module parameters, this is not the 1990's anymore.
> We have per-device settings everywhere, this makes that impossible.
> Just use a DT value, if it is wrong, then fix the DT value!  No need to
> have the kernel override it, that's not what DT files are for.

Thanks!

Cheers!

Vincent.