Sergei Shtylyov fd07f5e19c PCI: designware: Fix I/O space page leak ... When testing the R-Car PCIe driver on the Condor board, if the PCIe PHY driver is left disabled, the kernel crashed with this BUG: kernel BUG at lib/ioremap.c:72! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 39 Comm: kworker/0:1 Not tainted 4.17.0-dirty #1092 Hardware name: Renesas Condor board based on r8a77980 (DT) Workqueue: events deferred_probe_work_func pstate: 80000005 (Nzcv daif -PAN -UAO) pc : ioremap_page_range+0x370/0x3c8 lr : ioremap_page_range+0x40/0x3c8 sp : ffff000008da39e0 x29: ffff000008da39e0 x28: 00e8000000000f07 x27: ffff7dfffee00000 x26: 0140000000000000 x25: ffff7dfffef00000 x24: 00000000000fe100 x23: ffff80007b906000 x22: ffff000008ab8000 x21: ffff000008bb1d58 x20: ffff7dfffef00000 x19: ffff800009c30fb8 x18: 0000000000000001 x17: 00000000000152d0 x16: 00000000014012d0 x15: 0000000000000000 x14: 0720072007200720 x13: 0720072007200720 x12: 0720072007200720 x11: 0720072007300730 x10: 00000000000000ae x9 : 0000000000000000 x8 : ffff7dffff000000 x7 : 0000000000000000 x6 : 0000000000000100 x5 : 0000000000000000 x4 : 000000007b906000 x3 : ffff80007c61a880 x2 : ffff7dfffeefffff x1 : 0000000040000000 x0 : 00e80000fe100f07 Process kworker/0:1 (pid: 39, stack limit = 0x (ptrval)) Call trace: ioremap_page_range+0x370/0x3c8 pci_remap_iospace+0x7c/0xac pci_parse_request_of_pci_ranges+0x13c/0x190 rcar_pcie_probe+0x4c/0xb04 platform_drv_probe+0x50/0xbc driver_probe_device+0x21c/0x308 __device_attach_driver+0x98/0xc8 bus_for_each_drv+0x54/0x94 __device_attach+0xc4/0x12c device_initial_probe+0x10/0x18 bus_probe_device+0x90/0x98 deferred_probe_work_func+0xb0/0x150 process_one_work+0x12c/0x29c worker_thread+0x200/0x3fc kthread+0x108/0x134 ret_from_fork+0x10/0x18 Code: f9004ba2 54000080 aa0003fb 17ffff48 (d4210000) It turned out that pci_remap_iospace() wasn't undone when the driver's probe failed, and since devm_phy_optional_get() returned -EPROBE_DEFER, the probe was retried, finally causing the BUG due to trying to remap already remapped pages. The DesignWare PCIe controller driver has the same issue. Replace devm_pci_remap_iospace() with a devm_ managed version to fix the bug. Fixes: cbce790059 ("PCI: designware: Make driver arch-agnostic") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> [lorenzo.pieralisi@arm.com: updated the commit log] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jingoo Han <jingoohan1@gmail.com>		2018-07-18 17:00:29 -05:00
..
dwc	PCI: designware: Fix I/O space page leak	2018-07-18 17:00:29 -05:00
Kconfig
Makefile
pci-aardvark.c
pci-ftpci100.c	PCI: faraday: Add missing of_node_put()	2018-06-29 13:50:27 -05:00
pci-host-common.c
pci-host-generic.c
pci-hyperv.c	PCI: hv: Disable/enable IRQs rather than BH in hv_compose_msi_msg()	2018-07-09 13:16:07 -05:00
pci-mvebu.c
pci-rcar-gen2.c
pci-tegra.c
pci-thunder-ecam.c
pci-thunder-pem.c
pci-v3-semi.c
pci-versatile.c	PCI: versatile: Fix I/O space page leak	2018-07-18 17:00:11 -05:00
pci-xgene-msi.c
pci-xgene.c	PCI: xgene: Fix I/O space page leak	2018-07-18 16:59:40 -05:00
pcie-altera-msi.c
pcie-altera.c
pcie-cadence-ep.c
pcie-cadence-host.c
pcie-cadence.c
pcie-cadence.h
pcie-iproc-bcma.c
pcie-iproc-msi.c
pcie-iproc-platform.c
pcie-iproc.c
pcie-iproc.h
pcie-mediatek.c
pcie-mobiveil.c
pcie-rcar.c	PCI: rcar: Clean up PHY init on failure	2018-06-29 13:48:54 -05:00
pcie-rockchip-ep.c
pcie-rockchip-host.c
pcie-rockchip.c
pcie-rockchip.h
pcie-tango.c
pcie-xilinx-nwl.c	PCI: xilinx-nwl: Add missing of_node_put()	2018-06-29 13:50:10 -05:00
pcie-xilinx.c	PCI: xilinx: Add missing of_node_put()	2018-06-29 13:49:54 -05:00
vmd.c