From 41814c4eadf8a791b6d07114f96e7e120e59555c Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 4 Oct 2019 17:08:26 +0200 Subject: dmaengine: fsl-qdma: Handle invalid qdma-queue0 IRQ platform_get_irq_byname() might return -errno which later would be cast to an unsigned int and used in IRQ handling code leading to usage of wrong ID and errors about wrong irq_base. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Peng Ma Tested-by: Peng Ma Link: https://lore.kernel.org/r/20191004150826.6656-1-krzk@kernel.org Signed-off-by: Vinod Koul --- drivers/dma/fsl-qdma.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/dma/fsl-qdma.c') diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c index 06664fbd2d91..89792083d62c 100644 --- a/drivers/dma/fsl-qdma.c +++ b/drivers/dma/fsl-qdma.c @@ -1155,6 +1155,9 @@ static int fsl_qdma_probe(struct platform_device *pdev) return ret; fsl_qdma->irq_base = platform_get_irq_byname(pdev, "qdma-queue0"); + if (fsl_qdma->irq_base < 0) + return fsl_qdma->irq_base; + fsl_qdma->feature = of_property_read_bool(np, "big-endian"); INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels); -- cgit v1.2.3