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 <bige...@linutronix.de>
---
drivers/usb/musb/musb_gadget.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 4376f51..696e9e0 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,
--
1.8.4.rc2
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