[RFT] dmaengine: fsl-qdma: Handle invalid qdma-queue0 IRQ
From: Krzysztof Kozlowski
Date: Fri Oct 04 2019 - 11:08:38 EST
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@xxxxxxxxxx>
---
Not marking as cc-stable as this was not reproduced and not tested.
---
drivers/dma/fsl-qdma.c | 3 +++
1 file changed, 3 insertions(+)
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);
--
2.17.1