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    Subject[PATCH 4.14 122/228] PCI: Release IVRS table in AMD ACS quirk
    Date
    From: Hanjun Guo <guohanjun@huawei.com>

    [ Upstream commit 090688fa4e448284aaa16136372397d7d10814db ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/pci/quirks.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
    index 243b16ce0c8eb..da790f26d2950 100644
    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -4307,6 +4307,8 @@ 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);

    --
    2.25.1


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