linux-kernel - Re: [PATCH] soc: ti: QMSS: Fix usage of irq_set_affinity

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Message-ID: <2e742a7e-5e1f-a5ac-0372-f0e10a3783d7@oracle.com>
Date:   Tue, 30 Oct 2018 10:09:54 -0700
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Santosh Shilimkar <ssantosh@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] soc: ti: QMSS: Fix usage of irq_set_affinity_hint

10/30/2018 4:11 AM, Marc Zyngier wrote:
> The Keystone QMSS driver is pretty damaged, in the sense that it
> does things like this:
> 
> 	irq_set_affinity_hint(irq, to_cpumask(&cpu_map));
> 
> where cpu_map is a local variable. As we leave the function, this
> will point to nowhere-land, and things will end-up badly.
> 
> Instead, let's use a proper cpumask that gets allocated, giving
> the driver a chance to actually work with things like irqbalance
> as well as have a hypothetical 64bit future.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
> ---
Thanks Marc for the fix. Will send note to arm-soc folks
to pick this up for fixes and also stable.

Regards,
Santosh