From nobody Sat Oct 4 00:31:36 2025 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.3]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E89C62F066B; Fri, 22 Aug 2025 16:03:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.3 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755878593; cv=none; b=de1Ej5mPRC9/OU1Zc57PPXLXuV6b8G/fC8qKtYE3NBUV/JgO1uU3IUg6XPZX0TE9nIBClqhzd8QzIxNf7+bZ7uTAr//P4UDWcvS5+BnDxETds6daJeBwEzOYEC04/ufOPO+roRKZF7rCTQaLenRkKKaWQmm8FWRBmhon7S61E7k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755878593; c=relaxed/simple; bh=mSTZiv3w+AC7BonVwRiL1fK3888hGsM8Hv345BhmTIk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pPluxLyhr+OuEG9H5qD0r+g4YrLiVGiOBorEnnYDUsQDErYHBpy29qa6d6e1V4NQReDHB/D5OHzHC/kkWucyLkJHJ3obwOWfVb3yp8szNsKQ/R7xBYRDMR5LDgUsWMRyyOuSljrjq7d5fUuuTZVpJbLbJ3kUmvXB45QDAp5O2w4= 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=ik5VAvqF; arc=none smtp.client-ip=117.135.210.3 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="ik5VAvqF" 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=XK nBHPk3wclolPjnrkVycWfU4auAlCcr0wGUwYIwssI=; b=ik5VAvqFRxeWaWR6sG +Fvkq4TtWIFiGsaYDt4BgEuj/GvE3pvem4exxYvKkNmQ9Xu9QjPmrdtwnwSK6CGZ rqxxVDw4hLEIQs5++IpTF60YlXo68Pujkx7W77SgP08xTLKKTLdcvBKTrb2TyZij CJs2tznMT4m1WBUKrU4uPCt4I= Received: from localhost.localdomain (unknown []) by gzsmtp4 (Coremail) with SMTP id PygvCgBnxDaplKho3jnHAA--.18200S5; Sat, 23 Aug 2025 00:02:52 +0800 (CST) From: Hans Zhang <18255117159@163.com> To: bhelgaas@google.com, helgaas@kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Hans Zhang <18255117159@163.com> Subject: [PATCH v2 3/7] PCI: rcar-host: Replace msleep(1) with fsleep() for precise speed change monitoring Date: Fri, 22 Aug 2025 23:59:04 +0800 Message-Id: <20250822155908.625553-4-18255117159@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250822155908.625553-1-18255117159@163.com> References: <20250822155908.625553-1-18255117159@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: PygvCgBnxDaplKho3jnHAA--.18200S5 X-Coremail-Antispam: 1Uf129KBjvdXoW7Jry7tr4xKF1DWr18Gw17Jrb_yoWDZwc_ur yakF17CrWDC34akF12kw43tF9Yka4jqrnIva4Fq3W3AFW3X34kJrn29ryDXr1rCay5J3WS yw1DKr10kr47CjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUUxnY3UUUUU== X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/1tbiQxOxo2iokINYxAAAsN Content-Type: text/plain; charset="utf-8" The msleep(1) in rcar_pcie_force_speedup() may sleep longer than intended due to timer granularity, which can cause unnecessary delays in PCIe speed change detection. Replace it with fsleep() for a more precise delay of exactly 1ms. Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/controller/pcie-rcar-host.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controll= er/pcie-rcar-host.c index fe288fd770c4..5651285f1fb2 100644 --- a/drivers/pci/controller/pcie-rcar-host.c +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -34,6 +34,8 @@ =20 #include "pcie-rcar.h" =20 +#define RCAR_SPEED_CHANGE_CHECK_US 1000 + struct rcar_msi { DECLARE_BITMAP(used, INT_PCI_MSI_NR); struct irq_domain *domain; @@ -339,7 +341,7 @@ static void rcar_pcie_force_speedup(struct rcar_pcie *p= cie) goto done; } =20 - msleep(1); + fsleep(RCAR_SPEED_CHANGE_CHECK_US); } =20 dev_err(dev, "Speed change timed out\n"); --=20 2.25.1