linux-kernel - [PATCH] iommu: fsl_pamu: Replace NO

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Message-Id: <2a2570a8d12c80a7d36837b6c586daa708ca09d7.1665033732.git.christophe.leroy@csgroup.eu>
Date:   Thu,  6 Oct 2022 07:24:03 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux.dev
Subject: [PATCH] iommu: fsl_pamu: Replace NO_IRQ by 0

NO_IRQ is used to check the return of irq_of_parse_and_map().

On some architecture NO_IRQ is 0, on other architectures it is -1.

irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.

So use 0 instead of using NO_IRQ.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 drivers/iommu/fsl_pamu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index 0d03f837a5d4..1b53d2da2c19 100644
--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -779,7 +779,7 @@ static int fsl_pamu_probe(struct platform_device *pdev)
 	of_get_address(dev->of_node, 0, &size, NULL);
 
 	irq = irq_of_parse_and_map(dev->of_node, 0);
-	if (irq == NO_IRQ) {
+	if (!irq) {
 		dev_warn(dev, "no interrupts listed in PAMU node\n");
 		goto error;
 	}
@@ -903,7 +903,7 @@ static int fsl_pamu_probe(struct platform_device *pdev)
 	return 0;
 
 error:
-	if (irq != NO_IRQ)
+	if (irq)
 		free_irq(irq, data);
 
 	kfree_sensitive(data);
-- 
2.37.1