linux-kernel - Re: [RFC/PATCH 2/5] usb: otg: twl4030: add support for notifier

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Date:	Fri, 11 Dec 2009 22:52:14 +0530
From:	sai pavan <saipavan.243@...il.com>
To:	Felipe Balbi <felipe.balbi@...ia.com>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Anton Vorontsov <avorontsov@...mvista.com>,
	Grazvydas Ignotas <notasas@...il.com>,
	Madhusudhan Chikkature <madhu.cr@...com>,
	linux-omap@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	David Brownell <dbrownell@...rs.sourceforge.net>
Subject: Re: [RFC/PATCH 2/5] usb: otg: twl4030: add support for notifier

>
> @@ -628,7 +628,8 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
>                else
>                        twl4030_phy_resume(twl);
>
> -               twl4030charger_usb_en(status == USB_LINK_VBUS);
> +               blocking_notifier_call_chain(&twl->otg.notifier, status,
> +                               twl->otg.gadget);
>        }

You might not want to invoke blocking notifier chain(may sleep) from
interrupt context. May be atomic notifier chain is appropriate here.
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