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Date:	Fri, 12 Feb 2010 12:32:36 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: Re: [PATCH net-2.6] sfc: Fix SFE4002 initialisation

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Tue, 09 Feb 2010 15:52:57 +0000

> From: Steve Hodgson <shodgson@...arflare.com>
> 
> Commit 357d46a17e54c9a87e0e6ef3930ff4ab2d232b81 "sfc: QT202x: Remove
> unreliable MMD check at initialisation" broke initialisation of the
> SFE4002.  efx_mdio_reset_mmd() returns a positive value rather than 0
> on success.  The above commit causes this value to be propagated up
> by qt202x_reset_phy(), which is treated as a failure by its callers.
> Change qt202x_reset_phy() to return 0 if successful.
> 
> The PCI layer treats >0 as "fail, but please call remove() anyway",
> which means that unloading the driver would cause a crash.  Add a
> WARN_ON() on the failure path of efx_pci_probe() to provide early
> warning if there are any other cases where we do this.
> 
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>

Applied to net-2.6, thanks.
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