Hello.
On 04-03-2013 12:22, Hannes Reinecke wrote:
xhci has its own interrupt enabling routine, which will try to
use MSI-X/MSI if present. So the usb core shouldn't try to enable
legacy interrupts; on some machines the xhci legacy IRQ setting
is invalid.
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Oliver Neukum <oneukum@xxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Frederik Himpe <fhimpe@xxxxxxxxx>
Cc: David Haerdeman <david@xxxxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 622b4a4..2647e75 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
[...]
@@ -187,15 +188,21 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
return -ENODEV;
dev->current_state = PCI_D0;
- /* The xHCI driver supports MSI and MSI-X,
- * so don't fail if the BIOS doesn't provide a legacy IRQ.
+ /*
+ * The xHCI driver supports MSI and MSI-X,
+ * so don't fail if the BIOS doesn't provide a legacy IRQ
+ * and do not try to enable legacy IRQs.
*/
- 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));
- retval = -ENODEV;
- goto disable_pci;
+ if ((driver->flags & HCD_MASK) != HCD_USB3) {
+ if (!dev->irq) {
+ dev_err(&dev->dev,
+ "Found HC with no IRQ. "
+ "Check BIOS/PCI %s setup!\n",
The message strings are allowed to take more than 80 chars (to facilitate
grepping for them), so no need to break this one; checkpatch.pl should not
complain...
+ pci_name(dev));
+ retval = -ENODEV;
+ goto disable_pci;
+ }
+ hcd_irq = dev->irq;
}
hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
WBR, Sergei
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