genirq/proc: Return proper error code when irq_set_affinity() fails
write_irq_affinity() returns the number of written bytes, which means success, unconditionally whether the actual irq_set_affinity() call succeeded or not. Add proper error handling and pass the error code returned from irq_set_affinity() back to user space in case of failure. [ tglx: Fixed coding style and massaged changelog ] Signed-off-by:Wen Yang <wen.yang99@zte.com.cn> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Reviewed-by:
Jiang Biao <jiang.biao2@zte.com.cn> Cc: zhong.weidong@zte.com.cn Link: https://lkml.kernel.org/r/1510106103-184761-1-git-send-email-wen.yang99@zte.com.cn
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