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PCI: designware-ep: Fix the Header Type check

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The current check will result in the multiple function device
fails to initialize. So fix the check by masking out the
multiple function bit.

Link: https://lore.kernel.org/r/20200818092746.24366-1-Zhiqiang.Hou@nxp.com
Fixes: 0b24134f78 ("PCI: dwc: Add validation that PCIe core is set to correct mode")
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Hou Zhiqiang 2020-08-18 17:27:46 +08:00 committed by Lorenzo Pieralisi
parent 9123e3a74e
commit 16270a9235
2 changed files with 3 additions and 1 deletions
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3
drivers/pci/controller/dwc/pcie-designware-ep.c
View File

@ -505,7 +505,8 @@ int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
u32 reg;
int i;
hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE);
hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE) &
PCI_HEADER_TYPE_MASK;
if (hdr_type != PCI_HEADER_TYPE_NORMAL) {
dev_err(pci->dev,
"PCIe controller is not set to EP mode (hdr_type:0x%x)!\n",

1
include/uapi/linux/pci_regs.h
View File

@ -76,6 +76,7 @@
#define PCI_CACHE_LINE_SIZE 0x0c /* 8 bits */
#define PCI_LATENCY_TIMER 0x0d /* 8 bits */
#define PCI_HEADER_TYPE 0x0e /* 8 bits */
#define PCI_HEADER_TYPE_MASK 0x7f
#define PCI_HEADER_TYPE_NORMAL 0
#define PCI_HEADER_TYPE_BRIDGE 1
#define PCI_HEADER_TYPE_CARDBUS 2