Linux Archive

Linux Archive (http://www.linux-archive.org/)
-   Ubuntu Kernel Team (http://www.linux-archive.org/ubuntu-kernel-team/)
-   -   PCI: Allow pcie_aspm=force to work even when FADT indicates it is unsupported (http://www.linux-archive.org/ubuntu-kernel-team/650722-pci-allow-pcie_aspm-force-work-even-when-fadt-indicates-unsupported.html)

Colin King 03-30-2012 10:13 AM

PCI: Allow pcie_aspm=force to work even when FADT indicates it is unsupported
 
From: Colin Ian King <colin.king@canonical.com>

BugLink: https://bugs.launchpad.net/ubuntu/+bug/962038

Right now using pcie_aspm=force will not enable ASPM if the FADT indicates
ASPM is unsupported. However, the semantics of force should probably allow
for this, especially as they did before the ASPM disable rework with commit
3c076351c4027a56d5005a39a0b518a4ba393ce2

This patch just skips the clearing of any ASPM setup that the firmware has
carried out on this bus if pcie_aspm=force is being used.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/pci/pcie/aspm.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 2275162..c73ed00 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -790,6 +790,9 @@ void pcie_clear_aspm(struct pci_bus *bus)
{
struct pci_dev *child;

+ if (aspm_force)
+ return;
+
/*
* Clear any ASPM setup that the firmware has carried out on this bus
*/
--
1.7.0.4


--
kernel-team mailing list
kernel-team@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/kernel-team


All times are GMT. The time now is 12:06 AM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.