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(unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wAX2JV7QbRpTApJAw--.54345S5; Sat, 14 Mar 2026 00:55:28 +0800 (CST) From: Hans Zhang <18255117159@163.com> To: lpieralisi@kernel.org, jingoohan1@gmail.com, mani@kernel.org, kwilczynski@kernel.org, bhelgaas@google.com, helgaas@kernel.org, florian.fainelli@broadcom.com, jim2101024@gmail.com Cc: robh@kernel.org, ilpo.jarvinen@linux.intel.com, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, claudiu.beznea.uj@bp.renesas.com, linux-mediatek@lists.infradead.org, linux-tegra@vger.kernel.org, linux-omap@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, shawn.lin@rock-chips.com, Hans Zhang <18255117159@163.com> Subject: [PATCH v9 3/5] PCI: j721e: Validate max-link-speed from DT Date: Sat, 14 Mar 2026 00:55:20 +0800 Message-Id: <20260313165522.123518-4-18255117159@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260313165522.123518-1-18255117159@163.com> References: <20260313165522.123518-1-18255117159@163.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: _____wAX2JV7QbRpTApJAw--.54345S5 X-Coremail-Antispam: 1Uf129KBjvdXoW7JF4rZw1ftr4xWFyxGF1DGFg_yoWDXFXE9F 1UXFWrAr4Uuryakr1YyryayF95A34Uuw18Wa4rtF4fAFyxWay5ZrnxAFWUWa97u3W7JF17 JFyDKFn5J3ZFkjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRNDGYtUUUUU== X-Originating-IP: [240e:b8f:927e:1000:ce47:698d:adec:5bb5] X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/xtbCxAD3m2m0QYDJ6wAA3W X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260313_095634_429118_14E95E98 X-CRM114-Status: GOOD ( 10.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Use the new pcie_get_link_speed() helper to validate the value read from the "max-link-speed" DT property. If the value is missing or invalid, fall back to Gen2 (speed = 2). This prepares for the removal of the range check in of_pci_get_max_link_speed(). Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/controller/cadence/pci-j721e.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index 6f2501479c70..bfdfe98d5aba 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -202,7 +202,8 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie, int ret; link_speed = of_pci_get_max_link_speed(np); - if (link_speed < 2) + if ((link_speed < 2) || + (pcie_get_link_speed(link_speed) == PCI_SPEED_UNKNOWN)) link_speed = 2; val = link_speed - 1; -- 2.34.1