linux-kernel - Re: [PATCH 4.4 08/56] ath10k: fix rfc1042 header retrieval in QCA4019 with eth decap mode

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Message-ID: <1528134761.2289.45.camel@codethink.co.uk>
Date:   Mon, 04 Jun 2018 18:52:41 +0100
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Sriram R <srirrama@...eaurora.org>
Cc:     stable@...r.kernel.org,
        Vasanthakumar Thiagarajan <vthiagar@....qualcomm.com>,
        Kalle Valo <kvalo@....qualcomm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4.4 08/56] ath10k: fix rfc1042 header retrieval in
 QCA4019 with eth decap mode

On Mon, 2018-05-14 at 08:48 +0200, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Vasanthakumar Thiagarajan <vthiagar@....qualcomm.com>
> 
> commit 2f38c3c01de945234d23dd163e3528ccb413066d upstream.
> 
> Chipset from QCA99X0 onwards (QCA99X0, QCA9984, QCA4019 & future)
> rx_hdr_status is not padded to align in 4-byte boundary. Define a
> new hw_params field to handle different alignment behaviour between
> different hw. This patch fixes improper retrieval of rfc1042 header
> with QCA4019. This patch along with "ath10k: Properly remove padding
> from the start of rx payload" will fix traffic failure in ethernet
> decap mode for QCA4019.
> 
> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@....qualcomm.com>
> Signed-off-by: Kalle Valo <kvalo@....qualcomm.com>
> Signed-off-by: Sriram R <srirrama@...eaurora.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[...]

I'm curious as to why this backport doesn't include the change to
ath10k_htt_rx_h_find_rfc1042().  I understand that the addition of the
new field is a dependency for the following patch, but shouldn't the
fix included in the upstream commit also be applied to 4.4?

Ben.

-- 
Ben Hutchings, Software Developer                         Codethink Ltd
https://www.codethink.co.uk/                 Dale House, 35 Dale Street
                                     Manchester, M1 2HF, United Kingdom