linux-kernel - Re: [PATCH] usb: host: tegra: make use of PHY pointer of HCD

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Message-ID: <Pine.LNX.4.44L0.1212181105210.1604-100000@iolanthe.rowland.org>
Date:	Tue, 18 Dec 2012 11:05:44 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Venu Byravarasu <vbyravarasu@...dia.com>
cc:	swarren@...dotorg.org, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: [PATCH] usb: host: tegra: make use of PHY pointer of HCD

On Tue, 18 Dec 2012, Venu Byravarasu wrote:

> As pointer to PHY structure can be stored in struct usb_hcd
> making use of it, to call PHY APIs.
> 
> Call to usb_phy_shutdown() is moved up in tegra_ehci_remove(),
> so that to avoid dereferencing of hcd after its freed up.
> 
> Signed-off-by: Venu Byravarasu <vbyravarasu@...dia.com>
> ---
> This patch depends on patch http://marc.info/?l=linux-kernel&m=135581274019690&w=2.
> Without above patch applied, phy->notify_connect & phy->notify_disconnect are
> set to some unknown values, which need not be NULL.
> This creates problem when hcd->phy pointer is initialized hub_port_init() in hub.c
> calls usb_phy_notify_connect().
> 
> Stephen,
> Can you plz take this patch through tegra tree, so as to take care of the dependencies?

Acked-by: Alan Stern <stern@...land.harvard.edu>

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