linux-kernel - [PATCH] genirq/procfs: Change the return value for set affinity permission error

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Message-ID: <20240826145805.5938-1-jeff.xie@linux.dev>
Date: Mon, 26 Aug 2024 22:58:05 +0800
From: Jeff Xie <jeff.xie@...ux.dev>
To: tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org,
	xiehuan09@...il.com,
	Jeff Xie <jeff.xie@...ux.dev>
Subject: [PATCH] genirq/procfs: Change the return value for set affinity permission error

Currently, when the affinity of an irq cannot be set due to lack of
permission, the write_irq_affinity() returns the error code -EIO

Obviously, due to a permissions error, it should return -EPERM

Signed-off-by: Jeff Xie <jeff.xie@...ux.dev>
---
 kernel/irq/proc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index dcf8190a58ca..7b3a4c92d148 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -142,7 +142,7 @@ static ssize_t write_irq_affinity(int type, struct file *file,
 	int err;
 
 	if (!irq_can_set_affinity_usr(irq) || no_irq_affinity)
-		return -EIO;
+		return -EPERM;
 
 	if (!zalloc_cpumask_var(&new_value, GFP_KERNEL))
 		return -ENOMEM;
-- 
2.43.0