linux-kernel - ath9k: dmar: DRHD: handling fault status reg 3

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Message-ID: <20140831132351.48c2a412@mdontu-l>
Date:	Sun, 31 Aug 2014 13:23:51 +0300
From:	Mihai Donțu <mihai.dontu@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: ath9k: dmar: DRHD: handling fault status reg 3

Hi,

I have this device:

03:02.0 Network controller: Qualcomm Atheros AR9227 Wireless Network Adapter (rev 01)
        Subsystem: Qualcomm Atheros Device 0300
        Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 19
        Memory at f7c00000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [40] #80 [0000]
        Kernel driver in use: ath9k

which works great, except dmesg keeps being spammed with messages like
this one:

[ 2880.027256] dmar: DRHD: handling fault status reg 3
[ 2880.027260] dmar: DMAR:[DMA Read] Request device [03:00.0] fault addr ffffd000 DMAR:[fault reason 06] PTE Read access is not set

Is this a driver issue or a hardware one? Can I somehow silence it
without disabling the use of the IOMMU?

Thanks,

-- 
Mihai Donțu
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