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Date: Mon, 20 Jan 2025 20:41:05 +0100
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Baoquan He <bhe@redhat.com>,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org,
	Mateusz =?utf-8?Q?Jo=C5=84czyk?= <mat.jonczyk@o2.pl>
Subject: Re: [PATCH] MIPS: pci-legacy: Override pci_address_to_pio
Message-ID: <Z46m0T_cNdpCfkCf@alpha.franken.de>
References: <20250114-malta-io-fixes-v1-1-74ef1dc402ec@flygoat.com>
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In-Reply-To: <20250114-malta-io-fixes-v1-1-74ef1dc402ec@flygoat.com>

On Tue, Jan 14, 2025 at 06:11:58PM +0000, Jiaxun Yang wrote:
> pci-legacy systems are not using logic_pio to managed PIO
> allocations, thus the generic pci_address_to_pio won't work
> when PCI_IOBASE is defined.
> 
> Override the function to use architecture implementation to
> fix the problem.
> 
> Cc: stable@vger.kernel.org
> Fixes: 4bfb53e7d317 ("mips: add <asm-generic/io.h> including")
> Reported-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
> Closes: https://lore.kernel.org/r/99f75c66-4c2d-45dc-a808-b5ba440c7551@app.fastmail.com/
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
> This is a quick fix for fixes tree and stable backporting.
> In long term, we should get logic_pio accept fixed mapping,
> and make PCI core code aware of platforms not using vmap
> for PCI_IOBASE.
> ---
>  arch/mips/pci/pci-legacy.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

applied to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
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