From nobody Tue Apr 7 16:16:40 2026 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8A631391828; Thu, 12 Mar 2026 16:38:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773333505; cv=none; b=nSDckZYW3pXKGPyKSkGX0IKvTLML/puNXaBuehkkUmHHXVecY1JajFsjnRIEOXEkCxvGM2/oVut1yCBeFl/WeBii6kAl94wHeJWEE0V9tiYEp6t7/dwlWyCOzWcCjQR3z5neKGFcLAWjANTNwTd0xFsvKigDm2mG6PQagojpEGQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773333505; c=relaxed/simple; bh=LaDMrP+pcd/JXJQNPKeJRt91RMSc2WISQEFS4Meu+2s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=NTMqTgqyymKZxY+GeIfMu7z7ZusqzioYB/x/NB5CPcZn+W/nBYrsOX/NxJ2zVFV/QnwgmZJfL914qg4S4Xih0upu18KqqwdtqFLdZKjSo72CawLoRbXFOhsAbCiogkQoG3C29z+1NYwp7/givmJ4K2D7tkmVHZZvP+PpBXuYVXQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=X2NtGY0w; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="X2NtGY0w" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=jq SuO3F12+BG9vDtSc8L1vzzspX/dhmwJJslZsHS+5w=; b=X2NtGY0w8SBaIDWXj5 Il37UHQvb343cKnDnms4MUpmABVPpI9rNone/r00hKvAMwWSH449oZcM9PLYLNel 49+SQmv2PRoO2drBhMBpbnm10yvwzTJ9xAxa+DnrjZLU3nJ7BJehmDf1FWJIgOvF L74Z2m3KlLuP6+Y6PtqCHbIz4= Received: from zhb.. (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wDnN1Gl67JpMC_OAQ--.12929S5; Fri, 13 Mar 2026 00:37:01 +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, Hans Zhang <18255117159@163.com> Subject: [PATCH v8 3/5] PCI: j721e: Validate max-link-speed from DT Date: Fri, 13 Mar 2026 00:36:50 +0800 Message-Id: <20260312163652.113228-4-18255117159@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260312163652.113228-1-18255117159@163.com> References: <20260312163652.113228-1-18255117159@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDnN1Gl67JpMC_OAQ--.12929S5 X-Coremail-Antispam: 1Uf129KBjvdXoW7JF4rZw1ftr4xWFyxGF1DGFg_yoWDXFXE9F 1UXFWrAr4Uuryakr1YyryayF95A34Uuw18Wa4rtF4fAFyxWay5ZrnxAFWUWa97u3W7JF17 JFyDKFn5J3ZFkjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRMjjg7UUUUU== X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/xtbCxA0t0Gmy661RhQAA39 Content-Type: text/plain; charset="utf-8" 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 =3D 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/contr= oller/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; =20 link_speed =3D of_pci_get_max_link_speed(np); - if (link_speed < 2) + if ((link_speed < 2) || + (pcie_get_link_speed(link_speed) =3D=3D PCI_SPEED_UNKNOWN)) link_speed =3D 2; =20 val =3D link_speed - 1; --=20 2.34.1