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dmaengine: fsl-qdma: Handle invalid qdma-queue0 IRQ

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[ Upstream commit 41814c4eadf8a791b6d07114f96e7e120e59555c ]

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 <[email protected]>
Reviewed-by: Peng Ma <[email protected]>
Tested-by: Peng Ma <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Krzysztof Kozlowski 2019-10-04 17:08:26 +02:00 • committed by Greg Kroah-Hartman
commit 37958001e1
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/fsl-qdma.c
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@ -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);