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132 lines
4.0 KiB
Diff
132 lines
4.0 KiB
Diff
From 6e347b5e05ea2ac4ac467a5a1cfaebb2c7f06f80 Mon Sep 17 00:00:00 2001
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From: Bjorn Helgaas <bhelgaas@google.com>
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Date: Thu, 9 Mar 2017 11:27:07 -0600
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Subject: [PATCH] PCI: iproc: Save host bridge window resource in struct
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iproc_pcie
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The host bridge memory window resource is inserted into the iomem_resource
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tree and cannot be deallocated until the host bridge itself is removed.
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Previously, the window was on the stack, which meant the iomem_resource
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entry pointed into the stack and was corrupted as soon as the probe
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function returned, which caused memory corruption and errors like this:
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pcie_iproc_bcma bcma0:8: resource collision: [mem 0x40000000-0x47ffffff] conflicts with PCIe MEM space [mem 0x40000000-0x47ffffff]
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Move the memory window resource from the stack into struct iproc_pcie so
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its lifetime matches that of the host bridge.
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Fixes: c3245a566400 ("PCI: iproc: Request host bridge window resources")
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Reported-and-tested-by: Rafał Miłecki <zajec5@gmail.com>
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Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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CC: stable@vger.kernel.org # v4.8+
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---
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drivers/pci/host/pcie-iproc-bcma.c | 24 ++++++++++++------------
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drivers/pci/host/pcie-iproc-platform.c | 19 ++++++++++---------
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drivers/pci/host/pcie-iproc.h | 1 +
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3 files changed, 23 insertions(+), 21 deletions(-)
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--- a/drivers/pci/host/pcie-iproc-bcma.c
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+++ b/drivers/pci/host/pcie-iproc-bcma.c
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@@ -44,8 +44,7 @@ static int iproc_pcie_bcma_probe(struct
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{
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struct device *dev = &bdev->dev;
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struct iproc_pcie *pcie;
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- LIST_HEAD(res);
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- struct resource res_mem;
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+ LIST_HEAD(resources);
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int ret;
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pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
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@@ -62,22 +61,23 @@ static int iproc_pcie_bcma_probe(struct
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pcie->base_addr = bdev->addr;
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- res_mem.start = bdev->addr_s[0];
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- res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
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- res_mem.name = "PCIe MEM space";
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- res_mem.flags = IORESOURCE_MEM;
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- pci_add_resource(&res, &res_mem);
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+ pcie->mem.start = bdev->addr_s[0];
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+ pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1;
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+ pcie->mem.name = "PCIe MEM space";
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+ pcie->mem.flags = IORESOURCE_MEM;
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+ pci_add_resource(&resources, &pcie->mem);
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pcie->map_irq = iproc_pcie_bcma_map_irq;
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- ret = iproc_pcie_setup(pcie, &res);
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- if (ret)
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+ ret = iproc_pcie_setup(pcie, &resources);
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+ if (ret) {
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dev_err(dev, "PCIe controller setup failed\n");
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-
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- pci_free_resource_list(&res);
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+ pci_free_resource_list(&resources);
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+ return ret;
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+ }
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bcma_set_drvdata(bdev, pcie);
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- return ret;
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+ return 0;
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}
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static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
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--- a/drivers/pci/host/pcie-iproc-platform.c
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+++ b/drivers/pci/host/pcie-iproc-platform.c
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@@ -46,7 +46,7 @@ static int iproc_pcie_pltfm_probe(struct
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struct device_node *np = dev->of_node;
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struct resource reg;
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resource_size_t iobase = 0;
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- LIST_HEAD(res);
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+ LIST_HEAD(resources);
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int ret;
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of_id = of_match_device(iproc_pcie_of_match_table, dev);
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@@ -108,23 +108,24 @@ static int iproc_pcie_pltfm_probe(struct
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pcie->phy = NULL;
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}
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- ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
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+ ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
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+ &iobase);
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if (ret) {
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- dev_err(dev,
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- "unable to get PCI host bridge resources\n");
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+ dev_err(dev, "unable to get PCI host bridge resources\n");
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return ret;
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}
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pcie->map_irq = of_irq_parse_and_map_pci;
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- ret = iproc_pcie_setup(pcie, &res);
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- if (ret)
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+ ret = iproc_pcie_setup(pcie, &resources);
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+ if (ret) {
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dev_err(dev, "PCIe controller setup failed\n");
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-
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- pci_free_resource_list(&res);
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+ pci_free_resource_list(&resources);
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+ return ret;
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+ }
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platform_set_drvdata(pdev, pcie);
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- return ret;
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+ return 0;
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}
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static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
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--- a/drivers/pci/host/pcie-iproc.h
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+++ b/drivers/pci/host/pcie-iproc.h
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@@ -68,6 +68,7 @@ struct iproc_pcie {
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#ifdef CONFIG_ARM
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struct pci_sys_data sysdata;
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#endif
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+ struct resource mem;
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struct pci_bus *root_bus;
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struct phy *phy;
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int (*map_irq)(const struct pci_dev *, u8, u8);
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