linux-kernel - [PATCH] scsi: mac_scsi: Replace NO

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Message-Id: <f11593e75ba2e18e3b76989255cbb2e53a0213b4.1665034244.git.christophe.leroy@csgroup.eu>
Date:   Thu,  6 Oct 2022 07:32:00 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Finn Thain <fthain@...ux-m68k.org>,
        Michael Schmitz <schmitzmic@...il.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: [PATCH] scsi: mac_scsi: 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/scsi/mac_scsi.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
index 2e511697fce3..e4df2b501e8b 100644
--- a/drivers/scsi/mac_scsi.c
+++ b/drivers/scsi/mac_scsi.c
@@ -478,7 +478,7 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
 	if (irq)
 		instance->irq = irq->start;
 	else
-		instance->irq = NO_IRQ;
+		instance->irq = 0;
 
 	hostdata = shost_priv(instance);
 	hostdata->base = pio_mem->start;
@@ -495,7 +495,7 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
 	if (error)
 		goto fail_init;
 
-	if (instance->irq != NO_IRQ) {
+	if (instance->irq) {
 		error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
 		                    "NCR5380", instance);
 		if (error)
@@ -514,7 +514,7 @@ static int __init mac_scsi_probe(struct platform_device *pdev)
 	return 0;
 
 fail_host:
-	if (instance->irq != NO_IRQ)
+	if (instance->irq)
 		free_irq(instance->irq, instance);
 fail_irq:
 	NCR5380_exit(instance);
@@ -528,7 +528,7 @@ static int __exit mac_scsi_remove(struct platform_device *pdev)
 	struct Scsi_Host *instance = platform_get_drvdata(pdev);
 
 	scsi_remove_host(instance);
-	if (instance->irq != NO_IRQ)
+	if (instance->irq)
 		free_irq(instance->irq, instance);
 	NCR5380_exit(instance);
 	scsi_host_put(instance);
-- 
2.37.1