evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
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>
This commit is contained in:
Peter Chen 2017-05-17 18:32:01 +03:00 • committed by Greg Kroah-Hartman
parent c0791b605f
commit ec0b553bd8
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/usb/host/xhci-mem.c
View file

@ -1709,7 +1709,7 @@ 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;