netdev - Re: [PATCH net-next] net/mlx5e: Avoid accessing NULL pointer at ndo_select

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Message-Id: <20150825.134524.1830707997009616231.davem@davemloft.net>
Date:	Tue, 25 Aug 2015 13:45:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	achiad@...lanox.com
Cc:	netdev@...r.kernel.org, amirv@...lanox.com, ogerlitz@...lanox.com,
	saeedm@...lanox.com, talal@...lanox.com, ranas@...lanox.com
Subject: Re: [PATCH net-next] net/mlx5e: Avoid accessing NULL pointer at
 ndo_select_queue

From: Achiad Shochat <achiad@...lanox.com>
Date: Sun, 23 Aug 2015 16:12:14 +0300

> From: Rana Shahout <ranas@...lanox.com>
> 
> To avoid multiply/division operations on the data path,
> we hold a {channel, tc}==>txq mapping table.
> We held this mapping table inside the channel object that is
> being destroyed upon some configuration operations (e.g MTU change).
> So in case ndo_select_queue occurs during such a configuration operation,
> it may access a NULL channel pointer, resulting in kernel panic.
> To fix this issue we moved the {channel, tc}==>txq mapping table
> outside the channel object so that it will be available also
> during such configuration operations.
> 
> 
> Signed-off-by: Rana Shahout <ranas@...lanox.com>

Applied, thanks.
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