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| author | Bjorn Helgaas <bhelgaas@google.com> | 2017-03-09 17:27:07 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-08 07:30:33 (GMT) |
| commit | 0dd5b335ed69d63bbda7234d6fca0e1c376129cf (patch) | |
| tree | 7415c07117608e08bdf8a36f66dc593d76f39258 /drivers/pci/host/pcie-iproc-bcma.c | |
| parent | 8f9155989f12aae24bedfcec33f9226beb466574 (diff) | |
| download | linux-0dd5b335ed69d63bbda7234d6fca0e1c376129cf.tar.xz | |
PCI: iproc: Save host bridge window resource in struct iproc_pcie
commit 6e347b5e05ea2ac4ac467a5a1cfaebb2c7f06f80 upstream.
The host bridge memory window resource is inserted into the iomem_resource
tree and cannot be deallocated until the host bridge itself is removed.
Previously, the window was on the stack, which meant the iomem_resource
entry pointed into the stack and was corrupted as soon as the probe
function returned, which caused memory corruption and errors like this:
pcie_iproc_bcma bcma0:8: resource collision: [mem 0x40000000-0x47ffffff] conflicts with PCIe MEM space [mem 0x40000000-0x47ffffff]
Move the memory window resource from the stack into struct iproc_pcie so
its lifetime matches that of the host bridge.
Fixes: c3245a566400 ("PCI: iproc: Request host bridge window resources")
Reported-and-tested-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/host/pcie-iproc-bcma.c')
| -rw-r--r-- | drivers/pci/host/pcie-iproc-bcma.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c index 8ce0890..46ca8ed 100644 --- a/drivers/pci/host/pcie-iproc-bcma.c +++ b/drivers/pci/host/pcie-iproc-bcma.c @@ -44,8 +44,7 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) { struct device *dev = &bdev->dev; struct iproc_pcie *pcie; - LIST_HEAD(res); - struct resource res_mem; + LIST_HEAD(resources); int ret; pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); @@ -62,22 +61,23 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) pcie->base_addr = bdev->addr; - res_mem.start = bdev->addr_s[0]; - res_mem.end = bdev->addr_s[0] + SZ_128M - 1; - res_mem.name = "PCIe MEM space"; - res_mem.flags = IORESOURCE_MEM; - pci_add_resource(&res, &res_mem); + pcie->mem.start = bdev->addr_s[0]; + pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1; + pcie->mem.name = "PCIe MEM space"; + pcie->mem.flags = IORESOURCE_MEM; + pci_add_resource(&resources, &pcie->mem); pcie->map_irq = iproc_pcie_bcma_map_irq; - ret = iproc_pcie_setup(pcie, &res); - if (ret) + ret = iproc_pcie_setup(pcie, &resources); + if (ret) { dev_err(dev, "PCIe controller setup failed\n"); - - pci_free_resource_list(&res); + pci_free_resource_list(&resources); + return ret; + } bcma_set_drvdata(bdev, pcie); - return ret; + return 0; } static void iproc_pcie_bcma_remove(struct bcma_device *bdev) |