From: Sebastian Andrzej Siewior Date: Tue, 13 Aug 2013 17:35:43 +0000 (+0200) Subject: usb: musb: honour the return value of dma_map_single() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7b360f4287e52802b8c62e0608737e8bbfda67e1;p=linux-beck.git usb: musb: honour the return value of dma_map_single() Since dma_map_single() may fail it is good to actually check the return code to see if it succeeded. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 4376f51f5ef1..696e9e0b05af 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -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,