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Subject[PATCH 3.16 219/346] usb: gadget: udc: core: don't starve DMA resources
3.16.39-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Felipe Balbi <felipe.balbi@linux.intel.com>

commit 23fd537c9508fb6e3b93ddf23982f51afc087781 upstream.

Always unmap all SG entries as required by DMA API

Fixes: a698908d3b3b ("usb: gadget: add generic map/unmap request utilities")
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
[bwh: Backported to 3.16: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/usb/gadget/udc-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -91,7 +91,7 @@ void usb_gadget_unmap_request(struct usb
return;

if (req->num_mapped_sgs) {
- dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs,
+ dma_unmap_sg(&gadget->dev, req->sg, req->num_sgs,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);

req->num_mapped_sgs = 0;
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