MMIO trace for "warm" boot of b43 on IdeaPad S9

[Paul Fertser]

On Wed, Oct 20, 2010 at 05:19:26PM -0500, Larry Finger wrote:
> The first thing that showed up was a difference in the Command register of the
> PCI configuration space at offset 0x04. The first read of this location for the
> cold boot returned 0x02, but the warm reboot returned 0x06. As that bit 4 means
> set bus mastering capability, it looks suspicious. The call to pci_bus_master()
> should take care of this, but let us check. Please apply the attached patch and
> do a cold boot to b43 so that we get the contents of the location when the DMA
> error occurs.

[  148.502999] b43-phy0 ERROR: Contents of PCI command 0x6

So no magic here.

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