Oliver Freyermuth <o.freyerm...@googlemail.com> :
[...]
> This looks like it could very well match the structure found in memory,
> so something would be broken related to rtl8169_do_counters, in the DMA
> transfer.
>
> Does this help - can I provide more info? I get the feeling this affects
> many tens of thousands of systems and just has been hidden due to network
> stats being read rarely...
It helps. Can you try the snippet below ?
diff --git a/drivers/net/ethernet/realtek/r8169.c
b/drivers/net/ethernet/realtek/r8169.c
index 272c5962e4f7..8531b41e3397 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -2238,16 +2238,12 @@ static bool rtl8169_do_counters(struct net_device *dev,
u32 counter_cmd)
bool ret;
RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
+ RTL_R32(CounterAddrHigh);
cmd = (u64)paddr & DMA_BIT_MASK(32);
RTL_W32(CounterAddrLow, cmd);
RTL_W32(CounterAddrLow, cmd | counter_cmd);
- ret = rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
-
- RTL_W32(CounterAddrLow, 0);
- RTL_W32(CounterAddrHigh, 0);
-
- return ret;
+ return rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
}
static bool rtl8169_reset_counters(struct net_device *dev)
