From: <gregkh@linuxfoundation.org>
To: peter.chen@nxp.com, gregkh@linuxfoundation.org,
mathias.nyman@linux.intel.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "usb: host: xhci-mem: allocate zeroed Scratchpad Buffer" has been added to the 4.11-stable tree
Date: Tue, 23 May 2017 14:14:17 +0200 [thread overview]
Message-ID: <14955416572528@kroah.com> (raw)
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 4.11-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-4.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 7480d912d549f414e0ce39331870899e89a5598c Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Wed, 17 May 2017 18:32:01 +0300
Subject: usb: host: xhci-mem: allocate zeroed Scratchpad Buffer
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>
---
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
@@ -1729,7 +1729,7 @@ 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 peter.chen@nxp.com are
queue-4.11/usb-host-xhci-mem-allocate-zeroed-scratchpad-buffer.patch
reply other threads:[~2017-05-23 12:14 UTC|newest]
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