This is a note to let you know that I've just added the patch titled
dmaengine: ste_dma40: Add missing IRQ check in d40_probe
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-ste_dma40-add-missing-irq-check-in-d40_pro.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d05c59c6b24c2bce20838205f6fe8e4db5e75bc8
Author: ruanjinjie <ruanjinjie@xxxxxxxxxx>
Date: Mon Jul 24 14:41:08 2023 +0000
dmaengine: ste_dma40: Add missing IRQ check in d40_probe
[ 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>
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 6671bfe084895..96a808b487cbe 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -3599,6 +3599,10 @@ 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) {
