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path: root/drivers/pci/pci.c
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-rw-r--r--drivers/pci/pci.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 56b9db4c658e..bdb442004537 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2545,6 +2545,25 @@ void pci_config_pm_runtime_put(struct pci_dev *pdev)
pm_runtime_put_sync(parent);
}
+static const struct dmi_system_id bridge_d3_blacklist[] = {
+#ifdef CONFIG_X86
+ {
+ /*
+ * Gigabyte X299 root port is not marked as hotplug capable
+ * which allows Linux to power manage it. However, this
+ * confuses the BIOS SMI handler so don't power manage root
+ * ports on that system.
+ */
+ .ident = "X299 DESIGNARE EX-CF",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+ DMI_MATCH(DMI_BOARD_NAME, "X299 DESIGNARE EX-CF"),
+ },
+ },
+#endif
+ { }
+};
+
/**
* pci_bridge_d3_possible - Is it possible to put the bridge into D3
* @bridge: Bridge to check
@@ -2590,6 +2609,9 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
if (bridge->is_hotplug_bridge)
return false;
+ if (dmi_check_system(bridge_d3_blacklist))
+ return false;
+
/*
* It should be safe to put PCIe ports from 2015 or newer
* to D3.