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 <krzk@kernel.org>
Reviewed-by: Peng Ma <peng.ma@nxp.com>
Tested-by: Peng Ma <peng.ma@nxp.com>
Link: https://lore.kernel.org/r/20191004150826.6656-1-krzk@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2019-10-04 17:08:26 +02:00 committed by Vinod Koul
parent 53596dfa59
commit 41814c4ead

View file

@ -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);