From: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx> The bridge logic at slot 0 only supports reads up to 0x40 and the rest of the PCI configuration space for this slot is marked as reserved in the manual. Trying a read from offset 0x100 is producing an error from the bridge. With error interrupts enabled, the following is printed: pci-rcar-gen2 ee0d0000.pci: error irq: status 00000014 Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx> Signed-off-by: Magnus Damm <damm@xxxxxxxxxxxxx> --- drivers/pci/host/pci-rcar-gen2.c | 4 ++++ 1 file changed, 4 insertions(+) --- 0005/drivers/pci/host/pci-rcar-gen2.c +++ work/drivers/pci/host/pci-rcar-gen2.c 2014-02-13 09:45:45.000000000 +0900 @@ -119,6 +119,10 @@ static void __iomem *rcar_pci_cfg_base(s if (slot > 2) return NULL; + /* bridge logic only has registers to 0x40 */ + if (slot == 0x0 && where >= 0x40) + return NULL; + val = slot ? RCAR_AHBPCI_WIN1_DEVICE | RCAR_AHBPCI_WIN_CTR_CFG : RCAR_AHBPCI_WIN1_HOST | RCAR_AHBPCI_WIN_CTR_CFG; -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
