dmaengine: tegra: Use platform_get_irq() to get IRQ resource

Use platform_irq_get() instead platform_get_resource() for IRQ resource
to fix the probe failure. platform_get_resource() fails to fetch the IRQ
resource as it might not be ready at that time.

platform_irq_get() is also the recommended way to get interrupt as it
directly gives the IRQ number and no conversion from resource is
required.

Fixes: ee17028009d4 ("dmaengine: tegra: Add tegra gpcdma driver")
Reported-by: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20220505091440.12981-1-akhilrajeev@nvidia.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c
index 97fe0e9..3951db5 100644 (file)
--- a/drivers/dma/tegra186-gpc-dma.c
+++ b/drivers/dma/tegra186-gpc-dma.c
@@ -1328,7 +1328,6 @@ static int tegra_dma_probe(struct platform_device *pdev)
        struct iommu_fwspec *iommu_spec;
        unsigned int stream_id, i;
        struct tegra_dma *tdma;
-       struct resource *res;
        int ret;
 
        cdata = of_device_get_match_data(&pdev->dev);
@@ -1367,16 +1366,13 @@ static int tegra_dma_probe(struct platform_device *pdev)
        for (i = 0; i < cdata->nr_channels; i++) {
                struct tegra_dma_channel *tdc = &tdma->channels[i];
 
+               tdc->irq = platform_get_irq(pdev, i);
+               if (tdc->irq < 0)
+                       return tdc->irq;
+
                tdc->chan_base_offset = TEGRA_GPCDMA_CHANNEL_BASE_ADD_OFFSET +
                                        i * cdata->channel_reg_size;
-               res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
-               if (!res) {
-                       dev_err(&pdev->dev, "No irq resource for chan %d\n", i);
-                       return -EINVAL;
-               }
-               tdc->irq = res->start;
                snprintf(tdc->name, sizeof(tdc->name), "gpcdma.%d", i);
-
                tdc->tdma = tdma;
                tdc->id = i;
                tdc->slave_id = -1;