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Message-Id: <20191110024846.32598-2-sashal@kernel.org>
Date: Sat, 9 Nov 2019 21:47:41 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Sinan Kaya <okaya@...nel.org>,
Michael Kelley <mikelley@...rosoft.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Sasha Levin <sashal@...nel.org>, linux-pci@...r.kernel.org,
linux-acpi@...r.kernel.org
Subject: [PATCH AUTOSEL 4.9 02/66] PCI/ACPI: Correct error message for ASPM disabling
From: Sinan Kaya <okaya@...nel.org>
[ Upstream commit 1ad61b612b95980a4d970c52022aa01dfc0f6068 ]
If _OSC execution fails today for platforms without an _OSC entry, code is
printing a misleading message saying disabling ASPM as follows:
acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
We need to ensure that platform supports ASPM to begin with.
Reported-by: Michael Kelley <mikelley@...rosoft.com>
Signed-off-by: Sinan Kaya <okaya@...nel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/acpi/pci_root.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index b66815f35be6b..317ecc2e5757b 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -454,8 +454,9 @@ static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)
decode_osc_support(root, "OS supports", support);
status = acpi_pci_osc_support(root, support);
if (ACPI_FAILURE(status)) {
- dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
- acpi_format_exception(status));
+ dev_info(&device->dev, "_OSC failed (%s)%s\n",
+ acpi_format_exception(status),
+ pcie_aspm_support_enabled() ? "; disabling ASPM" : "");
*no_aspm = 1;
return;
}
--
2.20.1
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