Intense-PC is Compulab's mini-desktop with Intel Panther Point
chipset.
Unconditional switchover to xHCI provided by function
usb_enable_xhci_ports() leads to surprising results, after shutdown
system powered-on again after a few seconds. On Windows power
related problems were not observed. Switching back to EHCI solves
the problem.
The patch switches usb ports back to EHCI during xhci shutdown
for Intense-PC.
Signed-off-by: Denis Turischev <denis@xxxxxxxxxxxxxx>
---
drivers/usb/host/xhci.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index a979cd0..541efaa 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -26,6 +26,8 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
+#include <linux/dmi.h>
+#include "pci-quirks.h"
#include "xhci.h"
@@ -656,8 +658,20 @@ void xhci_stop(struct usb_hcd *hcd)
*/
void xhci_shutdown(struct usb_hcd *hcd)
{
+ struct pci_dev *pdev;
+ const char *brd_name;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ pdev = to_pci_dev(hcd->self.controller);
+
+ if (usb_is_intel_switchable_xhci(pdev)) {
+ brd_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+ /* quirk for Compulab's Intense-PC board */
+ if (brd_name && strstr(brd_name, "Intense-PC"))
+ usb_disable_xhci_ports(pdev);
+ }
+
spin_lock_irq(&xhci->lock);
xhci_halt(xhci);
spin_unlock_irq(&xhci->lock);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
