4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Victor Gu <[email protected]> commit 4fa3999ee672c54a5498ce98e20fe3fdf9c1cbb4 upstream. When setting the PIO_ADDR_LS register during a configuration read, we were properly passing the device number, function number and register number, but not the bus number, causing issues when reading the configuration of PCIe devices. Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver") Cc: <[email protected]> Signed-off-by: Victor Gu <[email protected]> Reviewed-by: Wilson Ding <[email protected]> Reviewed-by: Nadav Haklai <[email protected]> [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni <[email protected]> Signed-off-by: Lorenzo Pieralisi <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/pci/host/pci-aardvark.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -175,8 +175,6 @@ #define PCIE_CONFIG_WR_TYPE0 0xa #define PCIE_CONFIG_WR_TYPE1 0xb -/* PCI_BDF shifts 8bit, so we need extra 4bit shift */ -#define PCIE_BDF(dev) (dev << 4) #define PCIE_CONF_BUS(bus) (((bus) & 0xff) << 20) #define PCIE_CONF_DEV(dev) (((dev) & 0x1f) << 15) #define PCIE_CONF_FUNC(fun) (((fun) & 0x7) << 12) @@ -459,7 +457,7 @@ static int advk_pcie_rd_conf(struct pci_ advk_writel(pcie, reg, PIO_CTRL); /* Program the address registers */ - reg = PCIE_BDF(devfn) | PCIE_CONF_REG(where); + reg = PCIE_CONF_ADDR(bus->number, devfn, where); advk_writel(pcie, reg, PIO_ADDR_LS); advk_writel(pcie, 0, PIO_ADDR_MS);
