From: Andiry Xu <andiry.xu@amd.com>
Date: Wed, 27 Oct 2010 08:44:52 +0000 (+0800)
Subject: xHCI: release spinlock when setup interrupt
X-Git-Tag: v2.6.37-rc4~62^2~12^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=74bb844af8ec6a4c360b1fc7feb139801c0cacfd;p=profile%2Fivi%2Fkernel-x86-ivi.git

xHCI: release spinlock when setup interrupt

Jiri Slaby reports spinlock is held while calling kmalloc(GFP_KERNEL)
and request_irq() in xhci_resume().

Release the spinlock when setup interrupt.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
---

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 5d7d4e9..7c8d70f 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -714,6 +714,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		return retval;
 	}
 
+	spin_unlock_irq(&xhci->lock);
 	/* Re-setup MSI-X */
 	if (hcd->irq)
 		free_irq(hcd->irq, hcd);
@@ -736,6 +737,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		hcd->irq = pdev->irq;
 	}
 
+	spin_lock_irq(&xhci->lock);
 	/* step 4: set Run/Stop bit */
 	command = xhci_readl(xhci, &xhci->op_regs->command);
 	command |= CMD_RUN;