USB: use IRQF_DISABLED for HCD interrupt handlers

Host controller IRQs are supposed to be serviced with interrupts
disabled.  This patch (as1026) adds an IRQF_DISABLED flag to all the
controller drivers that lack it.  It also replaces the
spin_lock_irqsave() and spin_unlock_irqrestore() calls in uhci_irq()
with simple spin_lock() and spin_unlock().

This fixes Bugzilla #9335.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 5 deletions

diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 4db17f75f4f1..ec987897b8ed 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -378,7 +378,6 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
 {
         struct uhci_hcd *uhci = hcd_to_uhci(hcd);
         unsigned short status;
-        unsigned long flags;
 
         /*
          * Read the interrupt status, and write it back to clear the
@@ -398,7 +397,7 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
                         dev_err(uhci_dev(uhci), "host controller process "
                                         "error, something bad happened!\n");
                 if (status & USBSTS_HCH) {
-                        spin_lock_irqsave(&uhci->lock, flags);
+                        spin_lock(&uhci->lock);
                         if (uhci->rh_state >= UHCI_RH_RUNNING) {
                                 dev_err(uhci_dev(uhci),
                                         "host controller halted, "
@@ -415,16 +414,16 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
                                  * pending unlinks */
                                 mod_timer(&hcd->rh_timer, jiffies);
                         }
-                        spin_unlock_irqrestore(&uhci->lock, flags);
+                        spin_unlock(&uhci->lock);
                 }
         }
 
         if (status & USBSTS_RD)
                 usb_hcd_poll_rh_status(hcd);
         else {
-                spin_lock_irqsave(&uhci->lock, flags);
+                spin_lock(&uhci->lock);
                 uhci_scan_schedule(uhci);
-                spin_unlock_irqrestore(&uhci->lock, flags);
+                spin_unlock(&uhci->lock);
         }
 
         return IRQ_HANDLED;