usb: musb: honour the return value of dma_map_single() (7b360f42) · Commits · 戴 / test

Since dma_map_single() may fail it is good to actually check the return code to see if it succeeded. Signed-off-by:

drivers/usb/musb/musb_gadget.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -76,13 +76,21 @@ static inline void map_dma_buffer(struct musb_request *request,
		return;

		if (request->request.dma == DMA_ADDR_INVALID) {
		request->request.dma = dma_map_single(
		dma_addr_t dma_addr;
		int ret;

		dma_addr = dma_map_single(
		musb->controller,
		request->request.buf,
		request->request.length,
		request->tx
		? DMA_TO_DEVICE
		: DMA_FROM_DEVICE);
		ret = dma_mapping_error(musb->controller, dma_addr);
		if (ret)
		return;

		request->request.dma = dma_addr;
		request->map_state = MUSB_MAPPED;
		} else {
		dma_sync_single_for_device(musb->controller,