From 1dbe162d53e11665b48a1c122899ffc2c068bef4 Mon Sep 17 00:00:00 2001 From: Dongdong Liu Date: Fri, 4 Dec 2015 16:32:25 -0600 Subject: [PATCH] PCI: hisi: Fix hisi_pcie_cfg_read() 32-bit reads For 32-bit config reads (size == 4), hisi_pcie_cfg_read() returned success but never filled in the data we read. Return the register data for 32-bit config reads. Without this fix, PCI doesn't work at all because enumeration depends on 32-bit config reads. The driver was tested internally, but got broken in the process of upstreaming, so this fixes the breakage. Fixes: 500a1d9a43e0 ("PCI: hisi: Add HiSilicon SoC Hip05 PCIe driver") Signed-off-by: Dongdong Liu Signed-off-by: Bjorn Helgaas Reviewed-by: Zhou Wang --- drivers/pci/host/pcie-hisi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pci/host/pcie-hisi.c b/drivers/pci/host/pcie-hisi.c index 163671a4f798..77f7c669a1b9 100644 --- a/drivers/pci/host/pcie-hisi.c +++ b/drivers/pci/host/pcie-hisi.c @@ -61,7 +61,9 @@ static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size, *val = *(u8 __force *) walker; else if (size == 2) *val = *(u16 __force *) walker; - else if (size != 4) + else if (size == 4) + *val = reg_val; + else return PCIBIOS_BAD_REGISTER_NUMBER; return PCIBIOS_SUCCESSFUL;