linux-kernel - Re: [PATCH] usb: host: xhci-plat: Iterate over parent nodes for finding quirks

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Date:   Tue, 5 Jun 2018 17:25:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
Cc:     Mathias Nyman <mathias.nyman@...el.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: host: xhci-plat: Iterate over parent nodes for
 finding quirks

On Tue, Jun 05, 2018 at 08:50:56PM +0530, Anurag Kumar Vulisha wrote:
> In xhci_plat_probe() both sysdev and pdev->dev are being used
> for finding quirks. There are some drivers(like dwc3 host.c)
> which adds quirks(like usb3-lpm-capable) into pdev and the logic
> present in xhci_plat_probe() checks for quirks in either sysdev
> or pdev for finding the quirks. Because of this logic, some of
> the quirks are getting missed(usb3-lpm-capable quirk added by dwc3
> host.c driver is getting missed).This patch fixes this by iterating
> over all the available parents for finding the quirks. In this way
> all the quirks which are present in child or parent are correctly
> updated.
> 
> Signed-off-by: Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>

So this is a bugfix?  If so, how far back in the kernel releases should
it go to?

thanks,

greg k-h