netdev - Re: [PATCH net-next] net/mlx4_core: Remove unnecessary validation for port number

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Message-Id: <20140121.231448.93291561692199367.davem@davemloft.net>
Date:	Tue, 21 Jan 2014 23:14:48 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	amirv@...lanox.com
Cc:	netdev@...r.kernel.org, ogerlitz@...lanox.com,
	monis@...lanox.co.il, matanb@...lanox.com
Subject: Re: [PATCH net-next] net/mlx4_core: Remove unnecessary validation
 for port number

From: Amir Vadai <amirv@...lanox.com>
Date: Tue, 21 Jan 2014 10:19:37 +0200

> From: Moni Shoua <monis@...lanox.co.il>
> 
> This is a fix to a regression introduced by commit:
> "982290a net/mlx4_core: Check port number for validity
> before accessing data"
> 
> IPoIB could not attach to multicast group and we get this in dmesg:
> [144214.145008] ib0: failed to attach to multicast group, ret = -22
> [144214.145016] ib0: couldn't attach QP to multicast group ff12:401b:ffff:0000:0000:0000:ffff:ffff
> [144214.145019] ib0: multicast join failed for ff12:401b:ffff:0000:0000:0000:ffff:ffff, status -22
> 
> The cause to the problem is because port is extracted from gid[5].
> Which is only valid for Ethernet.
> Removed this validation in mlx4_qp_attach_common(), which is accessed
> from both Ethernet and IB flows.
> Error flow for bad port value in Ethernet is already exists in that
> function.
> 
> Signed-off-by: Moni Shoua <monis@...lanox.co.il>
> Signed-off-by: Matan Barak <matanb@...lanox.com>
> Signed-off-by: Amir Vadai <amirv@...lanox.com>

Applied, thank you.
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