linux-kernel - Re: [linux-usb-devel] [PATCH] Properly unregister reboot notifier in case of failure in ehci hcd

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Date:	Mon, 31 Jul 2006 11:28:24 -0700 (PDT)
From:	Aleksey Gorelov <dared1st@...oo.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	David Brownell <david-b@...bell.net>,
	linux-usb-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...l.org>, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-usb-devel] [PATCH] Properly unregister reboot notifier in case of failure in ehci hcd



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

> On Mon, 31 Jul 2006, Aleksey Gorelov wrote:
> 
> >   If some problem occurs during ehci startup, for instance, request_irq fails, echi hcd driver
> > tries it best to cleanup, but fails to unregister reboot notifier, which in turn leads to
> crash on
> > reboot/poweroff. The following patch resolves this problem by not using reboot notifiers
> anymore,
> > but instead making ehci/ohci driver get its own shutdown method. For PCI, it is done through
> pci
> > glue, for everything else through platform driver glue.
> 
> Why do you need to change the bus glue?  Wouldn't it be a lot simpler just 
> to add ehci_shutdown as a member of ehci_pci_driver, for instance, with 
> similar changes to ehci_hcd_au1xxx_driver and ehci_hcd_fsl_driver?
> 
> Alan Stern

  This avoids code duplication for common for both ehci and ohci code (and possibly for uhci, but
it currently does not have any notifier/shutdown handler), and is consistent with other functions
there.

Aleks.
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