linux-kernel - Re: [PATCH 5.10 13/16] ARM: 9120/1: Revert "amba: make use of -1 IRQs warn"

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Message-ID: <20211105133243.GA9809@amd>
Date:   Fri, 5 Nov 2021 14:32:43 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Rob Herring <robh@...nel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: Re: [PATCH 5.10 13/16] ARM: 9120/1: Revert "amba: make use of -1
 IRQs warn"

Hi!

> From: Wang Kefeng <wangkefeng.wang@...wei.com>
> 
> commit eb4f756915875b0ea0757751cd29841f0504d547 upstream.
> 
> After commit 77a7300abad7 ("of/irq: Get rid of NO_IRQ usage"),
> no irq case has been removed, irq_of_parse_and_map() will return
> 0 in all cases when get error from parse and map an interrupt into
> linux virq space.
> 
> amba_device_register() is only used on no-DT initialization, see
>   s3c64xx_pl080_init()		arch/arm/mach-s3c/pl080.c
>   ep93xx_init_devices()		arch/arm/mach-ep93xx/core.c
> 
> They won't set -1 to irq[0], so no need the warn.

AFAICT this does not fix any bug. It is simply a WARN that can not
trigger.

Best regards,
							Pavel

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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