From: sashiko-bot@kernel.org
To: "Imre Kaloz" <kaloz@kernel.org>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] PCI: Avoid D3 on PLX PEX 8532/8533/8548 downstream ports
Date: Sun, 27 Sep 2026 11:02:01 +0000 [thread overview]
Message-ID: <20260927110201.A9C391F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260927105609.8813-1-kaloz@kernel.org>
> Runtime PM suspends an idle downstream port of a PLX/Broadcom PEX
> 8532/8533/8548 switch to D3hot, but that takes the whole switch down
> with it: any device behind another port of the same switch then
> faults with a fatal bus error on its next access, e.g. mptsas probe
> on a Sun Ultra 45.
>
> This surfaced on sparc64 once commit a5fb3ff63287 ("PCI: Allow PCI
> bridges to go to D3Hot on all non-x86") let bridges enter D3hot. Keep
> these downstream ports out of D3 by setting PCI_DEV_FLAGS_NO_D3.
>
> Fixes: a5fb3ff63287 ("PCI: Allow PCI bridges to go to D3Hot on all non-x86")
> Cc: stable@vger.kernel.org
> Signed-off-by: Imre Kaloz <kaloz@kernel.org>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260927105609.8813-1-kaloz@kernel.org?part=1
prev parent reply other threads:[~2026-09-27 11:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-27 10:56 [PATCH] PCI: Avoid D3 on PLX PEX 8532/8533/8548 downstream ports Imre Kaloz
2026-09-27 11:02 ` sashiko-bot [this message]
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