linux-kernel - Re: [PATCH 2/7] usb: xhci: plat: attach the usb

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Message-ID: <20151204221414.6de6a291@xhacker>
Date:	Fri, 4 Dec 2015 22:14:14 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<mathias.nyman@...el.com>, <gregkh@...uxfoundation.org>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 2/7] usb: xhci: plat: attach the usb_phy to the correct
 hcd

cc linux-usb@...r.kernel.org

On Fri, 4 Dec 2015 22:10:47 +0800
Jisheng Zhang wrote:

> Commit 7b8ef22ea547 ("usb: xhci: plat: Add USB phy support") adds the
> usb_phy for usb3, but it attached the usb_phy to incorrect hcd. The
> xhci->shared_hcd is the hcd for usb3, this patch fixes this issue
> by attach the usb_phy to the xhci->shared_hcd.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
> ---
>  drivers/usb/host/xhci-plat.c | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index b566304..a8c465a 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -82,6 +82,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
>  	struct resource         *res;
>  	struct usb_hcd		*hcd;
>  	struct clk              *clk;
> +	struct usb_phy		*usb_phy;
>  	int			ret;
>  	int			irq;
>  
> @@ -162,17 +163,18 @@ static int xhci_plat_probe(struct platform_device *pdev)
>  	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
>  		xhci->shared_hcd->can_do_streams = 1;
>  
> -	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
> -	if (IS_ERR(hcd->usb_phy)) {
> -		ret = PTR_ERR(hcd->usb_phy);
> +	usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
> +	if (IS_ERR(usb_phy)) {
> +		ret = PTR_ERR(usb_phy);
>  		if (ret == -EPROBE_DEFER)
>  			goto put_usb3_hcd;
> -		hcd->usb_phy = NULL;
> +		usb_phy = NULL;
>  	} else {
> -		ret = usb_phy_init(hcd->usb_phy);
> +		ret = usb_phy_init(usb_phy);
>  		if (ret)
>  			goto put_usb3_hcd;
>  	}
> +	xhci->shared_hcd->usb_phy = usb_phy;
>  
>  	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
>  	if (ret)
> @@ -189,7 +191,7 @@ dealloc_usb2_hcd:
>  	usb_remove_hcd(hcd);
>  
>  disable_usb_phy:
> -	usb_phy_shutdown(hcd->usb_phy);
> +	usb_phy_shutdown(usb_phy);
>  
>  put_usb3_hcd:
>  	usb_put_hcd(xhci->shared_hcd);
> @@ -211,7 +213,7 @@ static int xhci_plat_remove(struct platform_device *dev)
>  	struct clk *clk = xhci->clk;
>  
>  	usb_remove_hcd(xhci->shared_hcd);
> -	usb_phy_shutdown(hcd->usb_phy);
> +	usb_phy_shutdown(xhci->shared_hcd->usb_phy);
>  
>  	usb_remove_hcd(hcd);
>  	usb_put_hcd(xhci->shared_hcd);

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