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staging: emxx_udc: Fix passing of NULL to dma_alloc_coherent()

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[ Upstream commit cc34073c6248e9cec801bf690d1455f264d12357 ]

In nbu2ss_eq_queue() memory is allocated with dma_alloc_coherent(),
though, strangely, NULL is passed as the struct device* argument. Pass
the UDC's device instead. Fix up the corresponding call to
dma_free_coherent() in the same way.

Build-tested on x86 only.

Fixes: 33aa8d45a4 ("staging: emxx_udc: Add Emma Mobile USB Gadget driver")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Link: https://lore.kernel.org/r/20200825091928.55794-1-alex.dewar90@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Dewar 2020-08-25 10:19:28 +01:00 • committed by Greg Kroah-Hartman
commit 659da2df0c
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/emxx_udc/emxx_udc.c
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@ -2594,7 +2594,7 @@ static int nbu2ss_ep_queue(struct usb_ep *_ep,
if (req->unaligned) {
if (!ep->virt_buf)
ep->virt_buf = dma_alloc_coherent(NULL, PAGE_SIZE,
ep->virt_buf = dma_alloc_coherent(udc->dev, PAGE_SIZE,
&ep->phys_buf,
GFP_ATOMIC | GFP_DMA);
if (ep->epnum > 0) {
@ -3153,7 +3153,7 @@ static int nbu2ss_drv_remove(struct platform_device *pdev)
for (i = 0; i < NUM_ENDPOINTS; i++) {
ep = &udc->ep[i];
if (ep->virt_buf)
dma_free_coherent(NULL, PAGE_SIZE, (void *)ep->virt_buf,
dma_free_coherent(udc->dev, PAGE_SIZE, (void *)ep->virt_buf,
ep->phys_buf);
}