diff options
| author | Peter Chen <peter.chen@nxp.com> | 2017-05-17 18:32:01 +0300 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-08 06:12:46 -0400 |
| commit | 8732affeaf374527f44d49162a68b6f4f260ef8e (patch) | |
| tree | 6ac41693b3b1ac873d18b8303033952bf4ab45db /drivers/usb/host/xhci-mem.c | |
| parent | 2f68fe68ad96e45a172e17e3369c8d676b229c43 (diff) | |
usb: host: xhci-mem: allocate zeroed Scratchpad Buffer
[ Upstream commit 7480d912d549f414e0ce39331870899e89a5598c ]
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'
Cc: stable <stable@vger.kernel.org>
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 745aa2a20891..68e37424a26d 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1706,7 +1706,7 @@ static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags) 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; |