linux-kernel - [PATCH 2/7] PCI: call pcie_flr from reset_intel_82599_sfp

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Message-Id: <20170413145339.20186-3-hch@lst.de>
Date:   Thu, 13 Apr 2017 16:53:34 +0200
From:   Christoph Hellwig <hch@....de>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
        Salvatore Benedetto <salvatore.benedetto@...el.com>,
        Mike Marciniszyn <mike.marciniszyn@...el.com>,
        Dennis Dalessandro <dennis.dalessandro@...el.com>,
        Derek Chickles <derek.chickles@...iumnetworks.com>,
        Satanand Burla <satananda.burla@...iumnetworks.com>,
        Felix Manlunas <felix.manlunas@...iumnetworks.com>,
        Raghu Vatsavayi <raghu.vatsavayi@...iumnetworks.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     linux-pci@...r.kernel.org, qat-linux@...el.com,
        linux-crypto@...r.kernel.org, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] PCI: call pcie_flr from reset_intel_82599_sfp_virtfn

The 82599 quirk contained an outdated copy of the FLR code.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/pci/quirks.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 673683660b5c..b1775354cc69 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3642,19 +3642,11 @@ static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
 	 *
 	 * The 82599 supports FLR on VFs, but FLR support is reported only
 	 * in the PF DEVCAP (sec 9.3.10.4), not in the VF DEVCAP (sec 9.5).
-	 * Therefore, we can't use pcie_flr(), which checks the VF DEVCAP.
+	 * Thus we must call pcie_flr directly without first checking if it is
+	 * supported.
 	 */
-
-	if (probe)
-		return 0;
-
-	if (!pci_wait_for_pending_transaction(dev))
-		dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");
-
-	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
-
-	msleep(100);
-
+	if (!probe)
+		pcie_flr(dev);
 	return 0;
 }
 
-- 
2.11.0