netdev - Re: [PATCH net-next] cxgb4: continue in debug mode, if probe fails

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Message-Id: <20150827.113605.58103615206012304.davem@davemloft.net>
Date:	Thu, 27 Aug 2015 11:36:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hariprasad@...lsio.com
Cc:	netdev@...r.kernel.org, leedom@...lsio.com, nirranjan@...lsio.com
Subject: Re: [PATCH net-next] cxgb4: continue in debug mode, if probe fails

From: Hariprasad Shenai <hariprasad@...lsio.com>
Date: Wed, 26 Aug 2015 22:30:35 +0530

> If adapter is flashed with incorrect firmware, probe can fail.
> If probe fails, continue in debug mode, so one can also use the debug
> interface to update the firmware via ethtool.
> 
> Signed-off-by: Hariprasad Shenai <hariprasad@...lsio.com>

If the init fails, there are all of these software datastructure that
have not been allocated at all which ->open() blindly assumes it can
dereference.

Sorry, you're going to have to do a lot more work than this to allow
this situation to proceed.
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