netdev - Re: [PATCH 3.14-stable] net/mlx4_core: Preserve pci_dev_data after __mlx4_remove

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Date:	Sun, 1 Jun 2014 12:36:18 +0300
From:	Or Gerlitz <ogerlitz@...lanox.com>
To:	Wei Yang <weiyang@...ux.vnet.ibm.com>, <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Amir Vadai <amirv@...lanox.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>
Subject: Re: [PATCH 3.14-stable] net/mlx4_core: Preserve pci_dev_data after
 __mlx4_remove_one()

On 01/06/2014 12:30, Or Gerlitz wrote:
> Wait, I recently noticed that on 3.15-rcX if the host is rebooted when 
> the mlx4_core driver is loaded in SRIOV mode, we crash like that, 
> looking on this now, I think there's chance we can relate it to your 
> upstream change befdf89 "net/mlx4_core: Preserve pci_dev_data after 
> __mlx4_remove_one()"

this seems to fix the crash, will further evaluate and submit patch 
later today



index c187d74..c747736 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -2629,7 +2629,7 @@ static void __mlx4_remove_one(struct pci_dev *pdev)
         int               pci_dev_data;
         int p;

-       if (priv->removed)
+       if (!priv || priv->removed)
                 return;

         pci_dev_data = priv->pci_dev_data;

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