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Tue, 13 Jan 2026 10:27:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768300073; bh=C8UgsS+YrsZDchnel7CNOtadN1mg/ONjw32g4J6+OCI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=KHVExecNeP0XkZg6xghaAQoJqr/q0z3GdC0x9jlfMNdwId0ErGseOxuOiGwv29fD7 AvHvAxAYhEhEwlTtZ/HzVBPzak/DCiPS0cy2tK74aPn60U+CPG+/5TqEOYVmIpPOB+ t0lfLQrTlza7crImIQKqJobRsLqGMk0r+g0eXbY9SIXRxX+hMLbFEU7eN5Xkq1qwjt tqZncLDnAqJDaSQnuMYsFLITR5wWfSPuJ4e3LtNOMwEMkXQnDUSM9mD8VFTfDQepbM 3idXM1YFBgiHX990n6orktQZK0baqsg7qxAQ9euVwMmyZF8sanjixl845BLKqFX5sj jWW9lS8W7E+tQ== Date: Tue, 13 Jan 2026 11:27:40 +0100 From: Niklas Cassel To: Koichiro Den Cc: jingoohan1@gmail.com, mani@kernel.org, lpieralisi@kernel.org, kwilczynski@kernel.org, robh@kernel.org, bhelgaas@google.com, vigneshr@ti.com, s-vadapalli@ti.com, hongxing.zhu@nxp.com, l.stach@pengutronix.de, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, minghuan.Lian@nxp.com, mingkai.hu@nxp.com, roy.zang@nxp.com, jesper.nilsson@axis.com, heiko@sntech.de, srikanth.thokala@intel.com, marek.vasut+renesas@gmail.com, yoshihiro.shimoda.uh@renesas.com, geert+renesas@glider.be, magnus.damm@gmail.com, christian.bruel@foss.st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, thierry.reding@gmail.com, jonathanh@nvidia.com, hayashi.kunihiko@socionext.com, mhiramat@kernel.org, kishon@kernel.org, jirislaby@kernel.org, rongqianfeng@vivo.com, 18255117159@163.com, shawn.lin@rock-chips.com, nicolas.frattaroli@collabora.com, linux.amoon@gmail.com, vidyas@nvidia.com, Frank.Li@nxp.com, linux-omap@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@axis.com, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org Subject: Re: [PATCH v6 4/5] PCI: dwc: ep: Support BAR subrange inbound mapping via Address Match Mode iATU Message-ID: References: <20260113023715.3463724-1-den@valinux.co.jp> <20260113023715.3463724-5-den@valinux.co.jp> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Jan 13, 2026 at 11:15:42AM +0100, Niklas Cassel wrote: > On Tue, Jan 13, 2026 at 11:37:14AM +0900, Koichiro Den wrote: > > @@ -626,11 +831,22 @@ static const struct pci_epc_features* > > dw_pcie_ep_get_features(struct pci_epc *epc, u8 func_no, u8 vfunc_no) > > { > > struct dw_pcie_ep *ep = epc_get_drvdata(epc); > > + struct pci_epc_features *features; > > > > if (!ep->ops->get_features) > > return NULL; > > > > - return ep->ops->get_features(ep); > > + features = ep->ops->get_features(ep); > > + if (!features) > > + return NULL; > > + > > + /* All DWC-based glue drivers support dynamic inbound mapping */ > > + features->dynamic_inbound_mapping = true; > > I think you should create a separate patch, before this patch, that simply > sets: > features->dynamic_inbound_mapping = true; > > Since that is technically a different feature, independent of this > feature, so it deserves its own patch. The commit message for that separate patch should mention that the reason why there are no code changes when exposing/enabling support for the dynamic_inbound_mapping feature, is because the actual code changes to the the DWC driver already in commit 4284c88fff0e ("PCI: designware-ep: Allow pci_epc_set_bar() update inbound map address"). Kind regards, Niklas