sky2: handle advanced error recovery config issues

The PCI AER support may not work for a couple of reasons.
It may not be configured into the kernel or there may be a BIOS
bug that prevents MMCONFIG from working.  If MMCONFIG doesn't work
then the PCI registers that control AER will not be accessible via
pci_read_config functions; luckly there is another window to access
PCI space in the device, so use that.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 49ee264064ab..69525fd7908d 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -247,7 +247,8 @@ enum csr_regs {
         B3_PA_CTRL      = 0x01f0,
         B3_PA_TEST      = 0x01f2,
 
-        Y2_CFG_SPC      = 0x1c00,
+        Y2_CFG_SPC      = 0x1c00,       /* PCI config space region */
+        Y2_CFG_AER      = 0x1d00,       /* PCI Advanced Error Report region */
 };
 
 /*      B0_CTST                 16 bit  Control/Status register */