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Sun, 24 Sep 2017 00:17:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1506212231; bh=WjQSnzV4QmYLzJsgIhYiRV6NNrlQ1wa8lbZ2jJOS4/0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ot/G0e6/EAvyfNm24jCNz8t8m61Pz0xFyHmyIOq/QOg53q6QwzE4FPwYioAW76kyY Wk0ssKUyv//4Xprd7cajL2W05HfiasXeQXqASOaFjpzjoqNUXnA6ZIBEHMsUr6LBX8 mah8rNW2ShH/VV19ZRyizkBkzzZYR4WQtQenqYCw= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 9C5F960768 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: linux-pci@vger.kernel.org, timur@codeaurora.org, alex.williamson@redhat.com Subject: [PATCH 5/5] PCI: add device wait after slot and bus reset Date: Sat, 23 Sep 2017 20:16:58 -0400 Message-Id: <1506212218-29103-5-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1506212218-29103-1-git-send-email-okaya@codeaurora.org> References: <1506212218-29103-1-git-send-email-okaya@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170923_171728_732181_D3D37669 X-CRM114-Status: GOOD ( 11.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sinan Kaya , linux-arm-msm@vger.kernel.org, Bjorn Helgaas , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Rev 3.1 Sec 2.3.1 Request Handling Rules indicates that a device can issue CRS following secondary bus reset. Handle device presence gracefully. Signed-off-by: Sinan Kaya --- drivers/pci/pci.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 074adf9..7131aab 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4056,7 +4056,7 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe) pci_reset_bridge_secondary_bus(dev->bus->self); - return 0; + return pci_dev_wait(dev, "bus reset", 1000, 60000); } static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe) @@ -4077,6 +4077,7 @@ static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe) static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe) { struct pci_dev *pdev; + int rc; if (dev->subordinate || !dev->slot || dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET) @@ -4086,7 +4087,11 @@ static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe) if (pdev != dev && pdev->slot == dev->slot) return -ENOTTY; - return pci_reset_hotplug_slot(dev->slot->hotplug, probe); + rc = pci_reset_hotplug_slot(dev->slot->hotplug, probe); + if (!rc && !probe) + rc = pci_dev_wait(dev, "slot reset", 1000, 60000); + + return rc; } static void pci_dev_lock(struct pci_dev *dev)