From nobody Fri Oct 3 19:08:05 2025 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E5CBC2E1C6B; Tue, 26 Aug 2025 17:04:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756227846; cv=none; b=scfXp8gJuYUHtgkb4CPoEOMHY8nv31/z4T9c8GkNWdVLc/NS3FzH5Jn10He3NOx/pCmaRLSZIjA3hBpwnkxfat2yxgsD5sWkv2reLx7cYIOmh/hkEB3T4g+FulKNM6LE8Ca70hZu4yJIAY6pgnj4/uUnIma0GucGiVfIHwc0EwI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756227846; c=relaxed/simple; bh=RxbC6PRS5UWfVRhBWgHNMi2OVDBcE6RBrjCc4GiojgM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LbuL0z01oZrTeBr+OYWO7rwxqp1evxfubyQsgbyNfb2l6f5hnYIONGjgTwacX2t0PcvfQtJPpMJrSFollLSB/+uhB0BdDmlO7rg5zqHgFC6qtlyZRqjuWx2v+wcLwqpv7mK1L8U1AkVMeI5g0316jLLSRRZzwh6Ot5mXX/1dopk= 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=hu/amXSM; arc=none smtp.client-ip=220.197.31.5 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="hu/amXSM" 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=Uo wts4zfhr1/6N6PWGm/8Hg/npgCEGN+e6f6uoDvA5c=; b=hu/amXSM7XLdQPpe7l i+P+6dog+H2WCavBl60be1kawaf193WAkTdk28pVOiztE7/0kUCk3jXfUuvubFvc YVDBf+FsgvoX8CToIx9YVTnJChoWRdr/MrmiXDKKWOWrvtMEYaMxGlcQHbrZ1Kt1 5rIPolhigc+gGNdkRRtwdX8uE= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-2 (Coremail) with SMTP id _____wAH5Svt6K1o9DIiEg--.25085S10; Wed, 27 Aug 2025 01:03:45 +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 v3 8/8] PCI/DPC: Add macro for RP busy check delay Date: Wed, 27 Aug 2025 01:03:15 +0800 Message-Id: <20250826170315.721551-9-18255117159@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250826170315.721551-1-18255117159@163.com> References: <20250826170315.721551-1-18255117159@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: _____wAH5Svt6K1o9DIiEg--.25085S10 X-Coremail-Antispam: 1Uf129KBjvdXoWrKrykKrW8CF4UZF18Kw17Jrb_yoWkAwb_uF yFvryIyrW5CF97C3yYv3ySy34UA3Z7Zr1xWa1FyFWfZr17trnrJrZ2vw15trZ8W3y5XFy5 Aw4DJ34Yyr9rGjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sR_wvtJUUUUU== X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/1tbiOgC1o2it5y8lTQABsI Content-Type: text/plain; charset="utf-8" Add PCIE_EXP_DPC_BUSY_CHECK_MS macro for RP busy check delay. Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/pcie/dpc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index fc18349614d7..bd5e8cd9e43e 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -21,6 +21,8 @@ #define PCI_EXP_DPC_CTL_EN_MASK (PCI_EXP_DPC_CTL_EN_FATAL | \ PCI_EXP_DPC_CTL_EN_NONFATAL) =20 +#define PCIE_EXP_DPC_BUSY_CHECK_MS 10 + static const char * const rp_pio_error_string[] =3D { "Configuration Request received UR Completion", /* Bit Position 0 */ "Configuration Request received CA Completion", /* Bit Position 1 */ @@ -135,7 +137,7 @@ static int dpc_wait_rp_inactive(struct pci_dev *pdev) pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status); while (status & PCI_EXP_DPC_RP_BUSY && !time_after(jiffies, timeout)) { - msleep(10); + msleep(PCIE_EXP_DPC_BUSY_CHECK_MS); pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status); } if (status & PCI_EXP_DPC_RP_BUSY) { --=20 2.25.1