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Message-Id: <20241104061342.106865-1-zhoushengqing@ttyinfo.com>
Date: Mon, 4 Nov 2024 06:13:42 +0000
From: Zhou Shengqing <zhoushengqing@...info.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
linux-acpi@...r.kernel.org,
linux-pci@...r.kernel.org,
linux-kernel@...r.kernel.org,
zhoushengqing@...info.com
Subject: [PATCH] PRESERVE_BOOT_CONFIG function rev id doesn't match with spec.
Per PCI Firmware Specification Revision 3.3 Table 4-7 _DSM Definitions
for PCI. Preserve PCI Boot Configuration Initial Revision ID is 2. But
the code is 1.
Signed-off-by: Zhou Shengqing <zhoushengqing@...info.com>
---
drivers/pci/pci-acpi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index af370628e583..7a4cad0c1f00 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -132,7 +132,7 @@ bool pci_acpi_preserve_config(struct pci_host_bridge *host_bridge)
*/
obj = acpi_evaluate_dsm_typed(ACPI_HANDLE(&host_bridge->dev),
&pci_acpi_dsm_guid,
- 1, DSM_PCI_PRESERVE_BOOT_CONFIG,
+ 2, DSM_PCI_PRESERVE_BOOT_CONFIG,
NULL, ACPI_TYPE_INTEGER);
if (obj && obj->integer.value == 0)
return true;
--
2.39.2
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