linux-kernel - Re: [PATCH 1/2] PCI: leave MEM and IO decoding disabled during 64-bit BAR sizing, too

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Message-ID: <20120709131818.72799bcb@chromoly>
Date:	Mon, 9 Jul 2012 13:18:18 -0700
From:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	linux-pci@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	Robert Hancock <hancockrwd@...il.com>
Subject: Re: [PATCH 1/2] PCI: leave MEM and IO decoding disabled during
 64-bit BAR sizing, too

On Mon, 09 Jul 2012 12:20:18 -0600
Bjorn Helgaas <bhelgaas@...gle.com> wrote:

> After 253d2e5498, we disable MEM and IO decoding for most devices
> while we size 32-bit BARs.  However, we restore the original COMMAND
> register before we size the upper 32 bits of 64-bit BARs, so we can
> still cause a conflict.
> 
> This patch waits to restore the original COMMAND register until we're
> completely finished sizing the BAR.
agreed.

Thanks,

Jacob
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