linux-kernel - [PATCH V3 6/6] PCI: Add device wait after slot and bus reset

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Message-Id: <1514912423-13341-7-git-send-email-okaya@codeaurora.org>
Date:   Tue,  2 Jan 2018 12:00:23 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-pci@...r.kernel.org, timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH V3 6/6] PCI: Add device wait after slot and bus reset

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 <okaya@...eaurora.org>
Reviewed-by: Christoph Hellwig <hch@....de>
---
 drivers/pci/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index eae04aa..2c9e9a9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4161,7 +4161,7 @@ int pci_reset_bridge_secondary_bus(struct pci_dev *dev)
 {
 	pcibios_reset_secondary_bus(dev);
 
-	return 0;
+	return pci_dev_wait(dev, "bus reset", PCIE_RESET_READY_POLL_MS);
 }
 EXPORT_SYMBOL_GPL(pci_reset_bridge_secondary_bus);
 
-- 
1.9.1