Subject: Re: [PATCH 4.3] ath10k: fix DMA related firmware crashes on multiple
 devices
To: Kalle Valo <kvalo@qca.qualcomm.com>
References: <1442176540-34973-1-git-send-email-nbd@openwrt.org>
 <87si6h1o4q.fsf@kamboji.qca.qualcomm.com>
Cc: linux-wireless@vger.kernel.org, ath10k@lists.infradead.org
From: Felix Fietkau <nbd@openwrt.org>
Message-ID: <55F6733B.9030106@openwrt.org> (sfid-20150914_091240_640711_0617254A)
Date: Mon, 14 Sep 2015 09:11:55 +0200
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On 2015-09-14 09:00, Kalle Valo wrote:
> Felix Fietkau <nbd@openwrt.org> writes:
> 
>> Some platforms really don't like DMA bursts of 256 bytes, and this
>> causes the firmware to crash when sending beacons.
>> Also, changing this based on the firmware version does not seem to make
>> much sense, so use 128 bytes for all versions.
>>
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Felix Fietkau <nbd@openwrt.org>
> 
> Nice, good catch! Just to make sure, this fixes the issues some people
> have reported that 10.1 firmware works but 10.2 firmware crashes when
> starting beaconing?
Yes. I was able to reproduce that issue myself on a Gateworks Laguna
device, which is among the affected devices reported in that email
thread. This patch fixes it for me.

- Felix