linux-kernel - Re: [PATCH v1] xhci: Disable stream for xHC controller with XHCI_BROKEN

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Message-ID: <2025061801-gosling-urchin-c2cb@gregkh>
Date: Wed, 18 Jun 2025 08:03:37 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: xiehongyu1@...inos.cn
Cc: mathias.nyman@...el.com, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v1] xhci: Disable stream for xHC controller with
 XHCI_BROKEN_STREAMS

On Wed, Jun 18, 2025 at 01:51:33PM +0800, xiehongyu1@...inos.cn wrote:
> From: Hongyu Xie <xiehongyu1@...inos.cn>
> 
> Disable stream for platform xHC controller with broken stream.
> 
> Signed-off-by: Hongyu Xie <xiehongyu1@...inos.cn>
> ---
>  drivers/usb/host/xhci-plat.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 6dab142e72789..c79d5ed48a08b 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -328,7 +328,8 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s
>  	}
>  
>  	usb3_hcd = xhci_get_usb3_hcd(xhci);
> -	if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)
> +	if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4 &&
> +	    !(xhci->quirks & XHCI_BROKEN_STREAMS))
>  		usb3_hcd->can_do_streams = 1;
>  
>  	if (xhci->shared_hcd) {
> -- 
> 2.25.1
> 
> 

Should this be backported to stable kernels?  if so, how far back?

What commit id does this fix?  Or what hardware does this fix?

thanks,

greg k-h