AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-02 15:26:39 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

usb: Prevent dead ports when xhci is not enabled

Browse Source 
When the xHCI driver is not available, actively switch the ports to EHCI
mode since some BIOSes leave them in xHCI mode where they would
otherwise appear dead.  This was discovered on a  Dell Optiplex 7010,
but it's possible other systems could be affected.

This should be backported to kernels as old as 3.0, that contain the
commit 69e848c209 "Intel xhci: Support
EHCI/xHCI port switching."

Signed-off-by: David Moore <david.moore@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
This commit is contained in:
David Moore 2013-01-23 22:19:49 -08:00 committed by Sarah Sharp
parent 48c3375c5f
commit 58b2939b4d
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/host/pci-quirks.c
View File

@ -780,6 +780,7 @@ void usb_enable_xhci_ports(struct pci_dev *xhci_pdev)
"defaulting to EHCI.\n");
dev_warn(&xhci_pdev->dev,
"USB 3.0 devices will work at USB 2.0 speeds.\n");
usb_disable_xhci_ports(xhci_pdev);
return;
}