linux-kernel - Re: [PATCH] Revert "usb: musb: convert to devm_platform_ioremap_resource

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Message-ID: <X66Ks5ER2RRfUGB2@kroah.com>
Date:   Fri, 13 Nov 2020 14:31:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Chunfeng Yun <chunfeng.yun@...iatek.com>, Bin Liu <b-liu@...com>,
        Drew Fustini <drew@...7.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "usb: musb: convert to
 devm_platform_ioremap_resource_byname"

On Thu, Nov 12, 2020 at 02:59:00PM +0100, Geert Uytterhoeven wrote:
> This reverts commit 2d30e408a2a6b3443d3232593e3d472584a3e9f8.
> 
> On Beaglebone Black, where each interface has 2 children:
> 
>     musb-dsps 47401c00.usb: can't request region for resource [mem 0x47401800-0x474019ff]
>     musb-hdrc musb-hdrc.1: musb_init_controller failed with status -16
>     musb-hdrc: probe of musb-hdrc.1 failed with error -16
>     musb-dsps 47401400.usb: can't request region for resource [mem 0x47401000-0x474011ff]
>     musb-hdrc musb-hdrc.0: musb_init_controller failed with status -16
>     musb-hdrc: probe of musb-hdrc.0 failed with error -16
> 
> Before, devm_ioremap_resource() was called on "dev" ("musb-hdrc.0" or
> "musb-hdrc.1"), after it is called on "&pdev->dev" ("47401400.usb" or
> "47401c00.usb"), leading to a duplicate region request, which fails.
> 

Thanks for this, I'll go queue it up now.

greg k-h