4.14-stable review patch. If anyone has any objections, please let me know.
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From: ruanjinjie ruanjinjie@huawei.com
[ Upstream commit c05ce6907b3d6e148b70f0bb5eafd61dcef1ddc1 ]
Check for the return value of platform_get_irq(): if no interrupt is specified, it wouldn't make sense to call request_irq().
Fixes: 8d318a50b3d7 ("DMAENGINE: Support for ST-Ericssons DMA40 block v3") Signed-off-by: Ruan Jinjie ruanjinjie@huawei.com Reviewed-by: Linus Walleij linus.walleij@linaro.org Link: https://lore.kernel.org/r/20230724144108.2582917-1-ruanjinjie@huawei.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/ste_dma40.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index ee15d4fefbad2..498d9886ed9bc 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -3577,6 +3577,10 @@ static int __init d40_probe(struct platform_device *pdev) spin_lock_init(&base->lcla_pool.lock);
base->irq = platform_get_irq(pdev, 0); + if (base->irq < 0) { + ret = base->irq; + goto destroy_cache; + }
ret = request_irq(base->irq, d40_handle_interrupt, 0, D40_NAME, base); if (ret) {