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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-03-23 18:36:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-23 18:53:30 +0300 |
| commit | 4a28d77e359009b846951b06f7c0d8eec8dce298 (patch) | |
| tree | fbed2cd50b379a13957245db836cd3db43a91531 | |
| parent | fbdbbe6d3ee502b3bdeb4f255196bb45003614be (diff) | |
| download | linux-4a28d77e359009b846951b06f7c0d8eec8dce298.tar.xz | |
usb: gadget: pch_udc: Check for DMA mapping error
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>
Link: https://lore.kernel.org/r/20210323153626.54908-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/udc/pch_udc.c | 2 |
1 files changed, 1 insertions, 1 deletions
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, |