[PATCH 4.19 164/273] dmaengine: ste_dma40: Add missing IRQ check in d40_probe

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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: ruanjinjie <ruanjinjie@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230724144108.2582917-1-ruanjinjie@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 e588dc5daaa80..e9d76113c9e95 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -3584,6 +3584,10 @@ 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) {
-- 
2.40.1






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