From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net 1/1] r8169: fix sleepable allocation during
 netdevice stats retrieval.
Date: Wed, 09 Sep 2015 12:04:05 -0700 (PDT)
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From: poma <pomidorabelisima@gmail.com>
Date: Wed, 9 Sep 2015 20:34:36 +0200

> [  230.110233]  [<ffffffff810218e6>] dma_generic_alloc_coherent+0x96/0x130
> [  230.110242]  [<ffffffff81069865>] x86_swiotlb_alloc_coherent+0x25/0x50
> [  230.110250]  [<ffffffff810215fd>] dma_alloc_attrs+0x6d/0xe0
> [  230.110265]  [<ffffffffa002e25e>] rtl8169_map_counters+0x3e/0x70 [r8169]
> [  230.110277]  [<ffffffffa002f674>] rtl8169_update_counters+0x64/0x140 [r8169]
> [  230.110289]  [<ffffffffa002f8ff>] rtl8169_get_stats64+0xbf/0x130 [r8169]
> [  230.110299]  [<ffffffff81700b74>] dev_get_stats+0x54/0x100

The patch in question removes this call to dma_alloc_coherent() so you
aren't running a kernel which actually has the patch applied.