From: Felipe Balbi Date: Wed, 24 Aug 2016 11:33:27 +0000 (+0300) Subject: usb: gadget: udc: core: don't starve DMA resources X-Git-Tag: v3.16.39~129 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2c825d45170c36bda7472c6ee263e17eb3101849;p=thirdparty%2Fkernel%2Fstable.git usb: gadget: udc: core: don't starve DMA resources 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 [bwh: Backported to 3.16: adjust filename, context] Signed-off-by: Ben Hutchings --- diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index 38913eac6e7c9..d7ef85f388477 100644 --- 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_gadget *gadget, 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;