USB: Remove the SAW_IRQ hcd flag

The HCD_FLAG_SAW_IRQ flag was introduced in order to catch IRQ routing
errors: If an URB was unlinked and the host controller hadn't gotten
any IRQs, it seemed likely that the IRQs were directed to the wrong
vector.

This warning hasn't come up in many years, as far as I know; interrupt
routing now seems to be well under control.  Therefore there's no
reason to keep the flag around any more.  This patch (as1495) finally
removes it.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 1 insertions, 12 deletions

diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
index 9bfac657572e..565d79f06e6f 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -776,7 +776,6 @@ static int hwahc_probe(struct usb_interface *usb_iface,
                 goto error_alloc;
         }
         usb_hcd->wireless = 1;
-        set_bit(HCD_FLAG_SAW_IRQ, &usb_hcd->flags);
         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
         hwahc_init(hwahc);
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 940321b3ec68..2f8c17381c6c 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2389,17 +2389,7 @@ hw_died:
 
 irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
 {
-        irqreturn_t ret;
-        struct xhci_hcd *xhci;
-
-        xhci = hcd_to_xhci(hcd);
-        set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
-        if (xhci->shared_hcd)
-                set_bit(HCD_FLAG_SAW_IRQ, &xhci->shared_hcd->flags);
-
-        ret = xhci_irq(hcd);
-
-        return ret;
+        return xhci_irq(hcd);
 }
 
 /****           Endpoint Ring Operations        ****/