From: Victor Gu xigu@marvell.com
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: stable@vger.kernel.org Signed-off-by: Victor Gu xigu@marvell.com Reviewed-by: Wilson Ding dingwei@marvell.com Reviewed-by: Nadav Haklai nadavh@marvell.com [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni thomas.petazzoni@bootlin.com --- Changes since v2: - Drop PCIE_BDF() macro, since it's no longer used. Noticed by Bjorn Helgaas. --- drivers/pci/host/pci-aardvark.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index b72f15c99793..5b8201aaf34d 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -172,8 +172,6 @@ #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) @@ -456,7 +454,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, 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);