[047/119] USB: xhci: Fix scratchpad deallocation.

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>

commit 5294bea40666db5c5d6c336b8e4e55d69fa576ca upstream.

The scratchpad_free() function uses xhci->page_size to free some memory
with pci_free_consistent().  However, the page_size is set to zero before
the call, causing kernel oopses on driver unload.  Call scratchpad_free()
before setting xhci->page_size to zero.

Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Acked-by: John Youn <John.Youn@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/usb/host/xhci-mem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -797,9 +797,9 @@ void xhci_mem_cleanup(struct xhci_hcd *x
 				xhci->dcbaa, xhci->dcbaa->dma);
 	xhci->dcbaa = NULL;
 
+	scratchpad_free(xhci);
 	xhci->page_size = 0;
 	xhci->page_shift = 0;
-	scratchpad_free(xhci);
 }
 
 int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)


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