linux-kernel - Re: [PATCH v3] arm64: dts: ti: k3-j721s2: fix overlapping GICD memory region

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Message-ID: <87ilozpac5.wl-maz@kernel.org>
Date:   Fri, 17 Jun 2022 16:40:26 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Matt Ranostay <mranostay@...com>
Cc:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stable@...r.kernel.org>,
        Robin Murphy <robin.murphy@....com>, Nishanth Menon <nm@...com>
Subject: Re: [PATCH v3] arm64: dts: ti: k3-j721s2: fix overlapping GICD memory region

On Fri, 17 Jun 2022 16:13:04 +0100,
Matt Ranostay <mranostay@...com> wrote:
> 
> GICD region was overlapping with GICR causing the latter to not map
> successfully, and in turn the gic-v3 driver would fail to initialize.
> 
> This issue was hidden till commit 2b2cd74a06c3 ("irqchip/gic-v3: Claim
> iomem resources") replaced of_iomap() calls with of_io_request_and_map()
> that internally called request_mem_region().
> 
> Respective console output before this patchset:
> 
> [    0.000000] GICv3: /bus@...000/interrupt-controller@...0000: couldn't map region 0
> 
> Fixes: b8545f9d3a54 ("arm64: dts: ti: Add initial support for J721S2 SoC")
> Cc: linux-stable@...r.kernel.org
> Cc: Marc Zyngier <maz@...nel.org>
> Cc: Robin Murphy <robin.murphy@....com>
> Cc: Nishanth Menon <nm@...com>
> Signed-off-by: Matt Ranostay <mranostay@...com>

Acked-by: Marc Zyngier <maz@...nel.org>

	M.

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