| Message ID | 1533840383-7841-1-git-send-email-okaya@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | [1/2] PCI/ACPI: correct error message for ASPM disabling | expand |
On Thu, 2018-08-09 at 18:46 +0000, Sinan Kaya wrote: > 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. > > Signed-off-by: Sinan Kaya <okaya@kernel.org> > Reported-by: Michael Kelley <mikelley@microsoft.com> > --- > drivers/acpi/pci_root.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c [] > @@ -455,8 +455,13 @@ 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)); > + char *aspm_msg = ""; > + > + if (pcie_aspm_support_enabled()) > + aspm_msg = "; disabling ASPM"; > + > + dev_info(&device->dev, "_OSC failed (%s) %s\n", > + acpi_format_exception(status), aspm_msg); I think this would read better not using a temporary and using a ternary instead. dev_info(&device->dev, "_OSC failed (%s)%s\n", acpi_format_exception(status), pcie_aspm_support_enabled() ? "; disabling ASPM" : ""); > *no_aspm = 1; > return; > }
On 8/9/2018 8:27 PM, Joe Perches wrote: > I think this would read better not using a temporary and > using a ternary instead. Makes sense.
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 7433035..9d738e2 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -455,8 +455,13 @@ 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)); + char *aspm_msg = ""; + + if (pcie_aspm_support_enabled()) + aspm_msg = "; disabling ASPM"; + + dev_info(&device->dev, "_OSC failed (%s) %s\n", + acpi_format_exception(status), aspm_msg); *no_aspm = 1; return; }
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. Signed-off-by: Sinan Kaya <okaya@kernel.org> Reported-by: Michael Kelley <mikelley@microsoft.com> --- drivers/acpi/pci_root.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)