Patch "usb: host: xhci-mem: allocate zeroed Scratchpad Buffer" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

usb: host: xhci-mem: allocate zeroed Scratchpad Buffer

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-host-xhci-mem-allocate-zeroed-scratchpad-buffer.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Peter Chen <[email protected]>
Date: Wed, 17 May 2017 18:32:01 +0300
Subject: usb: host: xhci-mem: allocate zeroed Scratchpad Buffer

From: Peter Chen <[email protected]>

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'

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

@@ -1709,7 +1709,7 @@ static int scratchpad_alloc(struct xhci_
 	xhci->dcbaa->dev_context_ptrs[0] = cpu_to_le64(xhci->scratchpad->sp_dma);
 	for (i = 0; i < num_sp; i++) {
 		dma_addr_t dma;
-		void *buf = dma_alloc_coherent(dev, xhci->page_size, &dma,
+		void *buf = dma_zalloc_coherent(dev, xhci->page_size, &dma,
 				flags);
 		if (!buf)
 			goto fail_sp5;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/usb-host-xhci-mem-allocate-zeroed-scratchpad-buffer.patch