linux-kernel - Re: [PATCH 5/5] usb: xhci: allow multiple firmware versions

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Message-ID: <20190620122013.GE19295@kroah.com>
Date:   Thu, 20 Jun 2019 14:20:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Christian Lamparter <chunkeey@...glemail.com>
Subject: Re: [PATCH 5/5] usb: xhci: allow multiple firmware versions

On Thu, Jun 20, 2019 at 03:51:54PM +0530, Vinod Koul wrote:
> Allow multiple firmware file versions in table and load them in
> increasing order as we find them in the file system.
> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>
> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
> Cc: Christian Lamparter <chunkeey@...glemail.com>
> ---
>  drivers/usb/host/xhci-pci.c | 39 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 3574afac44c5..2ee9e6bbabcb 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -333,9 +333,12 @@ static const struct renesas_fw_entry {
>  	 *  - uPD720201 ES 2.0 sample whose revision ID is 2.
>  	 *  - uPD720201 ES 2.1 sample & CS sample & Mass product, ID is 3.
>  	 *  - uPD720202 ES 2.0 sample & CS sample & Mass product, ID is 2.
> +	 *
> +	 *  Entry expected_version should be kept in increasing order

Why?

>  	 */
>  	{ "K2013080.mem", 0x0014, 0x02, 0x2013 },
>  	{ "K2013080.mem", 0x0014, 0x03, 0x2013 },
> +	{ "K2026090.mem", 0x0014, 0x03, 0x2026 },
>  	{ "K2013080.mem", 0x0015, 0x02, 0x2013 },

Just put a { } entry here at the end and then you don't care about the
order at all.  Much simpler and easier to maintain over time.

thanks,

greg k-h