genirq/proc: 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.

Change the return value to -EPERM as that reflects the cause of error
correctly.

Signed-off-by: Jeff Xie <jeff.xie@linux.dev>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240826145805.5938-1-jeff.xie@linux.dev

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index d98fb9c2c6679e03e109618ee511cd5ee34d9a59..9081ada81c3d023a531d65e5a35a31f4d4ebbe55 100644 (file)
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -140,7 +140,7 @@ 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;