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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-14 14:48:15 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-14 14:48:15 -0800
commit887aa58e482dbf6d35d24cfa7b3315c8f5543339 (patch)
treeb72ffb8b5cb63f433afb59e7af4da0b92b9a2c86 /drivers
parentb7bc5925a9aafae970c3db1f118c97a7d503114e (diff)
parent68d07f64b8a11a852d48d1b05b724c3e20c0d94b (diff)
Merge tag 'for-usb-linus-2012-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-linus
xHCI bug fix for broken BIOS on some Intel systems. Happy Valentine's Day! Your present is a working xHCI driver under some Intel systems with buggy BIOSes that don't provide a legacy PCI IRQ line for the USB 3.0 host. Please queue for 3.3 and stable to share the love!
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/core/hcd-pci.c5
-rw-r--r--drivers/usb/core/hcd.c6
-rw-r--r--drivers/usb/host/xhci.c5
3 files changed, 13 insertions, 3 deletions
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index d136b8f4c8a..81e2c0d9c17 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -187,7 +187,10 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
return -ENODEV;
dev->current_state = PCI_D0;
- if (!dev->irq) {
+ /* The xHCI driver supports MSI and MSI-X,
+ * so don't fail if the BIOS doesn't provide a legacy IRQ.
+ */
+ if (!dev->irq && (driver->flags & HCD_MASK) != HCD_USB3) {
dev_err(&dev->dev,
"Found HC with no IRQ. Check BIOS/PCI %s setup!\n",
pci_name(dev));
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index eb19cba34ac..e1282328fc2 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2447,8 +2447,10 @@ int usb_add_hcd(struct usb_hcd *hcd,
&& device_can_wakeup(&hcd->self.root_hub->dev))
dev_dbg(hcd->self.controller, "supports USB remote wakeup\n");
- /* enable irqs just before we start the controller */
- if (usb_hcd_is_primary_hcd(hcd)) {
+ /* enable irqs just before we start the controller,
+ * if the BIOS provides legacy PCI irqs.
+ */
+ if (usb_hcd_is_primary_hcd(hcd) && irqnum) {
retval = usb_hcd_request_irqs(hcd, irqnum, irqflags);
if (retval)
goto err_request_irq;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 6bbe3c3a711..c939f5fdef9 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -352,6 +352,11 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd)
/* hcd->irq is -1, we have MSI */
return 0;
+ if (!pdev->irq) {
+ xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n");
+ return -EINVAL;
+ }
+
/* fall back to legacy interrupt*/
ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED,
hcd->irq_descr, hcd);