From: sashiko-bot@kernel.org
To: "Xincheng Zhang" <zhangxincheng@ultrarisc.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH 1/2] PCI: dwc: Allow drivers to skip MEM outbound iATU setup
Date: Thu, 27 Aug 2026 05:59:24 +0000 [thread overview]
Message-ID: <20260827055925.409D51F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260827055448.1818858-2-zhangxincheng@ultrarisc.com>
> Some DWC-based controllers do not require outbound iATU windows for MEM
> transactions. For those platforms, programming outbound iATU windows for
> host bridge MEM ranges is unnecessary and may constrain the available MEM
> aperture.
>
> Add dw_pcie_rp::bypass_ob_mem_iatu so drivers can skip generic MEM iATU
> setup while using the common DWC host init path.
>
> Existing drivers keep the current behavior because the flag defaults to
> false. The I/O iATU setup does not use the MEM resource iterator, and the
> iterator may be uninitialized when MEM setup is skipped. Avoid using it in
> the I/O iATU error path.
>
> Signed-off-by: Xincheng Zhang <zhangxincheng@ultrarisc.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260827055448.1818858-1-zhangxincheng@ultrarisc.com?part=1
next prev parent reply other threads:[~2026-08-27 5:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-27 5:54 [PATCH 0/2] PCI: dwc: Support large BARs on UltraRISC DP1000 Xincheng Zhang
2026-08-27 5:54 ` [PATCH 1/2] PCI: dwc: Allow drivers to skip MEM outbound iATU setup Xincheng Zhang
2026-08-27 5:59 ` sashiko-bot [this message]
2026-08-27 5:54 ` [PATCH 2/2] PCI: ultrarisc: Skip MEM outbound iATU setup on DP1000 Xincheng Zhang
2026-08-27 6:08 ` sashiko-bot
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