Niklas Cassel 794a8604fe PCI: dwc: Fix dw_pcie_ops NULL pointer dereference ... Fix a crash from dereferencing a NULL dw_pcie_ops pointer. For example, on ARTPEC-6: Unable to handle kernel NULL pointer dereference at virtual address 00000004 pgd = c0204000 [00000004] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc3-next-20170321 #1 Hardware name: Axis ARTPEC-6 Platform task: db098000 task.stack: db096000 PC is at dw_pcie_writel_dbi+0x2c/0xd0 Prior to 442ec4c04d ("PCI: dwc: all: Split struct pcie_port into host-only and core structures"), every driver had a struct pcie_host_ops with function pointers, typically used as: if (pp->ops->readl_rc) return pp->ops->readl_rc(...); 442ec4c04d split struct pcie_host_ops into two pieces: struct dw_pcie_host_ops and struct dw_pcie_ops, so the above became: if (pci->ops->readl_dbi) return pci->ops->readl_dbi(...); But pcie-artpec6.c and pcie-designware-plat.c don't need the dw_pcie_ops pointers and didn't supply a pci->ops struct, which leads to NULL pointer dereferences. Supply an empty struct dw_pcie_ops to avoid the NULL pointer dereferences. [bhelgaas: changelog] Fixes: 442ec4c04d ("PCI: dwc: all: Split struct pcie_port into host-only and core structures") Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Joao Pinto <jpinto@synopsys.com>		2017-04-04 08:24:25 -05:00
..
Kconfig	PCI: dwc: Select PCI_HOST_COMMON for hisi	2017-04-03 16:17:11 -05:00
Makefile
pci-dra7xx.c
pci-exynos.c	PCI: exynos: Initialize elbi_base even when using PHY framework	2017-03-07 12:46:38 -06:00
pci-imx6.c
pci-keystone-dw.c
pci-keystone.c
pci-keystone.h
pci-layerscape.c
pcie-armada8k.c
pcie-artpec6.c	PCI: dwc: Fix dw_pcie_ops NULL pointer dereference	2017-04-04 08:24:25 -05:00
pcie-designware-host.c
pcie-designware-plat.c	PCI: dwc: Fix dw_pcie_ops NULL pointer dereference	2017-04-04 08:24:25 -05:00
pcie-designware.c
pcie-designware.h
pcie-hisi.c
pcie-qcom.c
pcie-spear13xx.c