Re: [ambarus:spi-nor/next 1/15] drivers/spi/atmel-quadspi.c:1202 atmel_qspi_dma_init() warn: passing zero to 'PTR_ERR'

[Dan Carpenter <dan.carpenter@oracle.com>]

On Fri, Feb 11, 2022 at 08:30:48AM +0000, Tudor.Ambarus@microchip.com wrote:
> On 2/11/22 10:04, Dan Carpenter wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> > 
> > tree:   https://github.com/ambarus/linux-0day  spi-nor/next
> > head:   038b3fa2d89f1a00fdb8767704cdb799a0fe746b
> > commit: ff51c966a3c5144ae964797349747e680ee47c3a [1/15] spi: atmel-quadspi: Add support for sama7g5 QSPI
> > config: openrisc-randconfig-m031-20220210 (https://download.01.org/0day-ci/archive/20220211/202202110830.1OGwXRWt-lkp@intel.com/config )
> > compiler: or1k-linux-gcc (GCC) 11.2.0
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@intel.com>
> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> > 
> > smatch warnings:
> > drivers/spi/atmel-quadspi.c:1202 atmel_qspi_dma_init() warn: passing zero to 'PTR_ERR'
> > 
> > vim +/PTR_ERR +1202 drivers/spi/atmel-quadspi.c
> > 
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1194  static int atmel_qspi_dma_init(struct spi_controller *ctrl)
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1195  {
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1196     struct atmel_qspi *aq = spi_controller_get_devdata(ctrl);
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1197     int ret;
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1198
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1199     aq->rx_chan = dma_request_chan(&aq->pdev->dev, "rx");
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1200     if (IS_ERR(aq->rx_chan)) {
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1201             aq->rx_chan = NULL;
> > 
> > Need to preserve the error code before setting this to NULL
> > 
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19 @1202             return dev_err_probe(&aq->pdev->dev, PTR_ERR(aq->rx_chan),
> > ff51c966a3c514 drivers/spi/atmel-quadspi.c         Tudor Ambarus   2020-10-19  1203                                  "RX DMA channel is not available\n");
> > 
> > This will return success.
> > 
> 
> Indeed, thanks! This is a personal development branch, I'll fix it inline since
> the patch that adds support for this has not been integrated in mainline yet.
> I'm not sure if I have to add the Reported-by tags or how to give credit to
> a bug spotted on a patch that has not yet landed in mainline. Maybe by adding
> a comment in the comments section of the patch "---"?

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regards,
dan carpenter