netdev - [RFC PATCH 2/2] igb/ixgbe: add code to trigger function reset if reset

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Date:	Fri, 30 Jul 2010 17:59:12 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net, jbarnes@...tuousgeek.org
Cc:	netdev@...r.kernel.org, linux-pci@...r.kernel.org,
	Alexander Duyck <alexander.h.duyck@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [RFC PATCH 2/2] igb/ixgbe: add code to trigger function reset if
	reset_devices is set

From: Alexander Duyck <alexander.h.duyck@...el.com>

This change makes it so that both igb and ixgbe can trigger a full pcie
function reset if the reset_devices kernel parameter is defined.  The main
reason for adding this is that kdump can cause serious issues when the
kdump kernel resets the IOMMU while DMA transactions are still occurring.

Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---

 drivers/net/igb/igb_main.c     |    3 +++
 drivers/net/ixgbe/ixgbe_main.c |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 667b527..b924443 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1731,6 +1731,9 @@ static int __devinit igb_probe(struct pci_dev *pdev,
 		return -EINVAL;
 	}
 
+	if (reset_devices && pci_reset_device_function(pdev))
+		return -ENODEV;
+
 	err = pci_enable_device_mem(pdev);
 	if (err)
 		return err;
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 7d6a415..f459f24 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -6548,6 +6548,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
 		return -EINVAL;
 	}
 
+	if (reset_devices && pci_reset_device_function(pdev))
+		return -ENODEV;
+
 	err = pci_enable_device_mem(pdev);
 	if (err)
 		return err;

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