From: Thomas Gleixner <tglx@kernel.org>
To: Marc Zyngier <maz@kernel.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Robin Murphy <robin.murphy@arm.com>, stable@vger.kernel.org
Subject: Re: [PATCH] irqchip/gic-v3-its: Limit number of per-device MSIs to the range the ITS supports
Date: Sat, 07 Feb 2026 22:22:56 +0100 [thread overview]
Message-ID: <87h5rsb64v.ffs@tglx> (raw)
In-Reply-To: <20260206154816.3582887-1-maz@kernel.org>
On Fri, Feb 06 2026 at 15:48, Marc Zyngier wrote:
> The ITS driver blindly assumes that EventIDs are in abundant supply,
> to the point where it never checks how many the HW actually supports.
>
> It turns out that some pretty esoteric integrations make it so that
> only a few bits are available, all the way down to a. single. bit.
>
> Enforce the advertised limitation at the point of allocating the
> device structure, and hope that the endpoint driver can deal with
> such limitation.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Cc: stable@vger.kernel.org
Can you please provide a Fixes tag?
Thanks,
tglx
next prev parent reply other threads:[~2026-02-07 21:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-06 15:48 [PATCH] irqchip/gic-v3-its: Limit number of per-device MSIs to the range the ITS supports Marc Zyngier
2026-02-06 16:01 ` Robin Murphy
2026-02-07 21:22 ` Thomas Gleixner [this message]
2026-02-07 22:25 ` Marc Zyngier
2026-02-08 18:48 ` Zenghui Yu
2026-02-17 10:02 ` [tip: irq/urgent] " tip-bot2 for Marc Zyngier
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