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Subject[PATCH 3.2 028/106] usb: host: xhci-mem: allocate zeroed Scratchpad Buffer
3.2.93-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Chen <peter.chen@nxp.com>

commit 7480d912d549f414e0ce39331870899e89a5598c upstream.

According to xHCI ch4.20 Scratchpad Buffers, the Scratchpad
Buffer needs to be zeroed.

...
The following operations take place to allocate
Scratchpad Buffers to the xHC:
...
b. Software clears the Scratchpad Buffer to '0'

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: we only do one allocation for scratchpad buffers]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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
@@ -1591,7 +1591,7 @@ static int scratchpad_alloc(struct xhci_
if (!xhci->scratchpad)
goto fail_sp;

- xhci->scratchpad->sp_array = dma_alloc_coherent(dev,
+ xhci->scratchpad->sp_array = dma_zalloc_coherent(dev,
num_sp * sizeof(u64),
&xhci->scratchpad->sp_dma, flags);
if (!xhci->scratchpad->sp_array)
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