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Received: from DB9PR03MB8847.eurprd03.prod.outlook.com (2603:10a6:10:3dd::13) by PA4PR03MB6719.eurprd03.prod.outlook.com (2603:10a6:102:ed::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5924.15; Fri, 16 Dec 2022 19:11:16 +0000 Received: from DB9PR03MB8847.eurprd03.prod.outlook.com ([fe80::2b95:1fe4:5d8f:22fb]) by DB9PR03MB8847.eurprd03.prod.outlook.com ([fe80::2b95:1fe4:5d8f:22fb%6]) with mapi id 15.20.5880.019; Fri, 16 Dec 2022 19:11:16 +0000 Message-ID: <3c8c4cf8-9987-31d6-a19c-c18d9f41c7c1@seco.com> Date: Fri, 16 Dec 2022 14:11:11 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [irqchip: irq/irqchip-next] irqchip/ls-extirq: Fix endianness detection Content-Language: en-US To: Marc Zyngier Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, tglx@linutronix.de References: <20221201212807.616191-1-sean.anderson@seco.com> <167023926482.4906.17012979311813913704.tip-bot2@tip-bot2> <8e8bfa5e-f713-4590-95db-66ed6454881b@seco.com> <9a7ef68d94e7d0ca879b9f55f7634df5@kernel.org> From: Sean Anderson In-Reply-To: <9a7ef68d94e7d0ca879b9f55f7634df5@kernel.org> Content-Type: text/plain; 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Use >>> node->parent. This fixes endianness detection on big-endian platforms. >>> >>> Fixes: 1b00adce8afd ("irqchip/ls-extirq: Fix invalid wait context by avoiding to use regmap") >>> Signed-off-by: Sean Anderson >>> Signed-off-by: Marc Zyngier >>> Link: https://lore.kernel.org/r/20221201212807.616191-1-sean.anderson@seco.com >>> --- >>>  drivers/irqchip/irq-ls-extirq.c | 2 +- >>>  1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/drivers/irqchip/irq-ls-extirq.c b/drivers/irqchip/irq-ls-extirq.c >>> index d8d48b1..139f26b 100644 >>> --- a/drivers/irqchip/irq-ls-extirq.c >>> +++ b/drivers/irqchip/irq-ls-extirq.c >>> @@ -203,7 +203,7 @@ ls_extirq_of_init(struct device_node *node, struct device_node *parent) >>>         if (ret) >>>                 goto err_parse_map; >>> >>> -       priv->big_endian = of_device_is_big_endian(parent); >>> +       priv->big_endian = of_device_is_big_endian(node->parent); >>>         priv->is_ls1021a_or_ls1043a = of_device_is_compatible(node, "fsl,ls1021a-extirq") || >>>                                       of_device_is_compatible(node, "fsl,ls1043a-extirq"); >>>         raw_spin_lock_init(&priv->lock); >> >> This patch has made it into linux/master, but it should also get >> backported to 6.1. Just want to make sure this doesn't fall through the >> cracks, since this was a really annoying bug to deal with (causes an IRQ >> storm). > > If you wanted it backported, why didn't it have a Cc: stable > the first place? In any case, if you want a backport to happen, > you'll have to post that backport. Usually, anything with a Fixes: tag gets picked up. Actually, I was expecting you to submit a PR for 6.1, since this was submitted before that release came out. That said, this email is "option 2" of Documentation/process/stable-kernel-rules.rst, so I don't think I need to do "option 3". --Sean