linux-kernel - Re: [PATCH v3] s390: replace setup_irq() by request

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Date:   Tue, 10 Mar 2020 10:38:47 +0100
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     afzal mohammed <afzal.mohd.ma@...il.com>
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Sebastian Ott <sebott@...ux.ibm.com>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>
Subject: Re: [PATCH v3] s390: replace setup_irq() by request_irq()

On Wed, Mar 04, 2020 at 06:20:48AM +0530, afzal mohammed wrote:
> request_irq() is preferred over setup_irq(). Invocations of setup_irq()
> occur after memory allocators are ready.
> 
> Per tglx[1], setup_irq() existed in olden days when allocators were not
> ready by the time early interrupts were initialized.
> 
> Hence replace setup_irq() by request_irq().
> 
> [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos
> 
> Signed-off-by: afzal mohammed <afzal.mohd.ma@...il.com>
> ---
> Hi s390 maintainers,
> 
> if okay w/ this change, please consider taking it thr' your tree, else please
> let me know.
> 
> Regards
> afzal

Applied. However I changed the pr_err invocations to panic, since it
doesn't make sense to continue if interrupt registration fails that
early.