[PATCH 4.19 111/168] PCI: Release IVRS table in AMD ACS quirk

Greg Kroah-Hartman
2020-08-17T17:18:46Z

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 8f856657dac22..9129ccd593d10 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4334,6 +4334,8 @@ 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