PCI: Release IVRS table in AMD ACS quirk

The acpi_get_table() should be coupled with acpi_put_table() if the mapped
table is not used at runtime to release the table mapping.

In pci_quirk_amd_sb_acs(), IVRS table is just used for checking AMD IOMMU
is supported, not used at runtime, so put the table after using it.

Fixes: 15b100dfd1c9 ("PCI: Claim ACS support for AMD southbridge devices")
Link: https://lore.kernel.org/r/1595411068-15440-1-git-send-email-guohanjun@huawei.com
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 052efeb9f0532aa30ccf62cc02c8812d31b9a7e1..2456a1950a8a49300227c671c8268b85549bffd9 100644 (file)
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4409,6 +4409,8 @@ static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags)
        if (ACPI_FAILURE(status))
                return -ENODEV;
 
+       acpi_put_table(header);
+
        /* Filter out flags not applicable to multifunction */
        acs_flags &= (PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC | PCI_ACS_DT);