From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752470AbcJCFhp (ORCPT ); Mon, 3 Oct 2016 01:37:45 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:35327 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752246AbcJCFhP (ORCPT ); Mon, 3 Oct 2016 01:37:15 -0400 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 4BF9261AC5 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: linux-pci@vger.kernel.org, timur@codeaurora.org, cov@codeaurora.org, alex.williamson@redhat.com, vikrams@codeaurora.org Cc: Lorenzo.Pieralisi@arm.com, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sinan Kaya , linux-kernel@vger.kernel.org Subject: [PATCH V3 2/2] PCI: handle CRS returned by device after FLR Date: Mon, 3 Oct 2016 01:37:00 -0400 Message-Id: <1475473021-14251-3-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1475473021-14251-1-git-send-email-okaya@codeaurora.org> References: <1475473021-14251-1-git-send-email-okaya@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org An endpoint is allowed to issue CRS following an FLR request to indicate that it is not ready to accept new requests. Changing the polling mechanism in FLR wait function to go read the vendor ID instead of the command/status register. A CRS indication will only be given if the address to be read is vendor ID. Signed-off-by: Sinan Kaya --- drivers/pci/pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index c8749b9..7580b00 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3725,7 +3725,8 @@ static void pci_flr_wait(struct pci_dev *dev) do { msleep(100); - pci_read_config_dword(dev, PCI_COMMAND, &id); + pci_bus_read_dev_vendor_id(dev->bus, dev->devfn, &id, + 60 * 1000); } while (i++ < 10 && id == ~0); if (id == ~0) -- 1.9.1