From: Lino Sanfilippo <linosanfili...@gmx.de>
Date: Sun, 30 Nov 2014 12:56:51 +0100

> In sky2_change_mtu setting B0_IMSK to 0 may be delayed due to PCI write 
> posting
> which could result in irqs being still active when synchronize_irq is called.
> Since we are not prepared to handle any further irqs after synchronize_irq
> (our resources are freed after that) force the write by a consecutive read 
> from
> the same register.
> Similar situation in sky2_all_down: Here we disabled irqs by a write to 
> B0_IMSK
> but did not ensure that this write took place before synchronize_irq. Fix that
> too.
> 
> Signed-off-by: Lino Sanfilippo <linosanfili...@gmx.de>

Applied.
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