From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Pan Bian bianpan2016@163.com
[ Upstream commit 745ed17a04f966406c8c27c8f992544336c06013 ]
Put the PCI device rdev on error paths to fix potential reference count leaks.
Signed-off-by: Pan Bian bianpan2016@163.com Link: https://lore.kernel.org/r/20210121045005.73342-1-bianpan2016@163.com Reviewed-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/amd-pmc.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c index ef8342572463..b9da58ee9b1e 100644 --- a/drivers/platform/x86/amd-pmc.c +++ b/drivers/platform/x86/amd-pmc.c @@ -210,31 +210,39 @@ static int amd_pmc_probe(struct platform_device *pdev) dev->dev = &pdev->dev;
rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); - if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) + if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) { + pci_dev_put(rdev); return -ENODEV; + }
dev->cpu_id = rdev->device; err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_LO); if (err) { dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); + pci_dev_put(rdev); return pcibios_err_to_errno(err); }
err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); - if (err) + if (err) { + pci_dev_put(rdev); return pcibios_err_to_errno(err); + }
base_addr_lo = val & AMD_PMC_BASE_ADDR_HI_MASK;
err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_HI); if (err) { dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); + pci_dev_put(rdev); return pcibios_err_to_errno(err); }
err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); - if (err) + if (err) { + pci_dev_put(rdev); return pcibios_err_to_errno(err); + }
base_addr_hi = val & AMD_PMC_BASE_ADDR_LO_MASK; pci_dev_put(rdev);