Hello,
> Return -ENOMEM instead of zero(success) when it fails to get IRQ domain.
>
> Fixes: 8d786149d78c ("PCI: xilinx-xdma: Add Xilinx XDMA Root Port driver")
> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
> ---
> This is found with smatch and the patch is only compile tested.
> ---
> drivers/pci/controller/pcie-xilinx-dma-pl.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pcie-xilinx-dma-pl.c b/drivers/pci/controller/pcie-xilinx-dma-pl.c
> index 2f7d676c683c..52f3211d11cd 100644
> --- a/drivers/pci/controller/pcie-xilinx-dma-pl.c
> +++ b/drivers/pci/controller/pcie-xilinx-dma-pl.c
> @@ -576,7 +576,7 @@ static int xilinx_pl_dma_pcie_init_irq_domain(struct pl_dma_pcie *port)
> &intx_domain_ops, port);
> if (!port->intx_domain) {
> dev_err(dev, "Failed to get a INTx IRQ domain\n");
> - return PTR_ERR(port->intx_domain);
> + return -ENOMEM;
> }
This looks good.
However, there is probably another issue here on the failure path. I don't
see any of_node_put() to release the pcie_intc_node taken at the top of the
xilinx_pl_dma_pcie_init_irq_domain() function.
I would imagine a similar approach to the error handling as what we can see
from xilinx_cpm_pcie_init_irq_domain() function in the older driver.
Thippeswamy, can you have a look and see if this can be improved? I would
love to get a fix before Bjorn sends a Pull Request for the next release.
Krzysztof
