diff mbox series

[v2,3/7] usb: gadget: pch_udc: Check for DMA mapping error

Message ID 20210323153626.54908-3-andriy.shevchenko@linux.intel.com (mailing list archive)
State Accepted
Commit 4a28d77e359009b846951b06f7c0d8eec8dce298
Headers show
Series [v2,1/7] usb: gadget: pch_udc: Replace cpu_to_le32() by lower_32_bits() | expand

Commit Message

Andy Shevchenko March 23, 2021, 3:36 p.m. UTC
DMA mapping might fail, we have to check it with dma_mapping_error().
Otherwise DMA-API is not happy:

  DMA-API: pch_udc 0000:02:02.4: device driver failed to check map error[device address=0x00000000027ee678] [size=64 bytes] [mapped as single]

Fixes: abab0c67c061 ("usb: pch_udc: Fixed issue which does not work with g_serial")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: new patch
 drivers/usb/gadget/udc/pch_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index 2e3510dd026c..455fd9cde0e6 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -2946,7 +2946,7 @@  static int init_dma_pools(struct pch_udc_dev *dev)
 	dev->dma_addr = dma_map_single(&dev->pdev->dev, ep0out_buf,
 				       UDC_EP0OUT_BUFF_SIZE * 4,
 				       DMA_FROM_DEVICE);
-	return 0;
+	return dma_mapping_error(&dev->pdev->dev, dev->dma_addr);
 }
 
 static int pch_udc_start(struct usb_gadget *g,