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

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Date:   Wed, 10 May 2023 09:57:14 +0200
From:   Greg KH <greg@...ah.com>
To:     Vincenzo Palazzo <vincenzopalazzodev@...il.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,

greg k-h