linux-kernel - Re: [PATCH v3 08/10] usb: phy: tegra: Add error handling & clean up.

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Date:	Fri, 10 May 2013 22:06:48 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Venu Byravarasu <vbyravarasu@...dia.com>
CC:	gregkh@...uxfoundation.org, swarren@...dotorg.org, balbi@...com,
	stern@...land.harvard.edu, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v3 08/10] usb: phy: tegra: Add error handling & clean
 up.

Hello.

On 05/10/2013 05:54 PM, Venu Byravarasu wrote:

> Check return values from all GPIO APIs and handle errors accordingly.
>
> Remove the call to clk_disable_unprepare(); this function does not
> prepare or enable the clock, so the error path should not disable or
> unprepare it.
>
> Signed-off-by: Venu Byravarasu <vbyravarasu@...dia.com>
[...]
> diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
> index a2a89a9..dce692a 100644
> --- a/drivers/usb/phy/phy-tegra-usb.c
> +++ b/drivers/usb/phy/phy-tegra-usb.c
[...]
> @@ -624,24 +632,44 @@ static int	tegra_phy_init(struct usb_phy *x)
[...]
>   		phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
> +		if (!phy->ulpi) {
> +			dev_err(phy->dev, "otg_ulpi_create returned err\n");

    Rather "returned NULL".

WBR, Sergei

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