diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2013-08-13 19:35:43 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-08-27 21:07:29 +0200 |
| commit | 7b360f4287e52802b8c62e0608737e8bbfda67e1 (patch) | |
| tree | 8612951cac15b5e12f15a1b38679c4cb9176dfe7 /drivers/usb/musb/musb_gadget.c | |
| parent | usb: gadget: configfs: keep a function if it is not successfully added (diff) | |
| download | linux-7b360f4287e52802b8c62e0608737e8bbfda67e1.tar.xz linux-7b360f4287e52802b8c62e0608737e8bbfda67e1.zip | |
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 <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 10 |
1 files changed, 9 insertions, 1 deletions
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, |