From: Thomas Gleixner <tglx@kernel.org>
To: Rustam Adilov <adilov@disroot.org>,
Birger Koblitz <mail@birger-koblitz.de>,
Bert Vermeulen <bert@biot.com>, John Crispin <john@phrozen.org>,
linux-kernel@vger.kernel.org
Cc: Rustam Adilov <adilov@disroot.org>,
Carlo Szelinsky <github@szelinsky.de>,
Markus Stockhausen <markus.stockhausen@gmx.de>
Subject: Re: [PATCH] irqchip/irq-realtek-rtl: change to __raw reads and writes
Date: Wed, 15 Jul 2026 09:10:12 +0200 [thread overview]
Message-ID: <874ii0pw2z.ffs@fw13> (raw)
In-Reply-To: <20260711082328.43535-1-adilov@disroot.org>
On Sat, Jul 11 2026 at 13:23, Rustam Adilov wrote:
> To make the interrupt driver operable with SWAP_IO_SPACE
> config enabled, replace all instances of readl/writel with
> their __raw variants. Otherwise readl/writel will do a byte
> swap which this driver does not intend to do.
Sorry, but this word salad does not qualify as a change log. See
https://docs.kernel.org/process/maintainer-tip.html#changelog
First you want to explain what the context:
When CONFIG_SWAP_IO_SPACE is enabled readl() and writel() imply a byte
swap.
Then you want to explain why this is not correct for this
driver/hardware. Just saying 'does not intend to do' contains zero
information:
This is incorrect for the RTL driver, because <Insert proper technical explanation>
Then you tell how you cure it:
Fix this by converting the MMIO accesses to __raw_readl() and
__raw_writel(), which do not byte swap the data.
Thanks,
tglx
prev parent reply other threads:[~2026-07-15 7:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-11 8:23 [PATCH] irqchip/irq-realtek-rtl: change to __raw reads and writes Rustam Adilov
2026-07-15 7:10 ` Thomas Gleixner [this message]
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