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irq: Only block userspace IRQ affinities if SBalance is enabled

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If SBalance is enabled, IRQ affinity should be managed automatically.
Prevent userspace from modifying it in this case, but allow changes
when SBalance is disabled.

Change-Id: Ibf37bf258a2358ad8b982704e8f035bd9739866b
Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
This commit is contained in:
Richard Raya 2025-01-31 19:35:18 -03:00
parent 0636ec7ac0
commit 485a90ebf2
1 changed files with 3 additions and 0 deletions
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3
kernel/irq/proc.c
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@ -145,7 +145,10 @@ static ssize_t write_irq_affinity(int type, struct file *file,
cpumask_var_t new_value;
int err;
#ifdef CONFIG_IRQ_SBALANCE
return count;
#endif
if (!irq_can_set_affinity_usr(irq) || no_irq_affinity)
return -EIO;