Patch "r8169: fix memory corruption on retrieval of hardware statistics." has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

r8169: fix memory corruption on retrieval of hardware statistics.

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
r8169-fix-memory-corruption-on-retrieval-of-hardware-statistics.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Francois Romieu <[email protected]>
Date: Fri, 26 Jan 2018 01:53:26 +0100
Subject: r8169: fix memory corruption on retrieval of hardware statistics.

From: Francois Romieu <[email protected]>

[ Upstream commit a78e93661c5fd30b9e1dee464b2f62f966883ef7 ]

Hardware statistics retrieval hurts in tight invocation loops.

Avoid extraneous write and enforce strict ordering of writes targeted to the tally counters dump area address registers.

---
 drivers/net/ethernet/realtek/r8169.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

@@ -2205,19 +2205,14 @@ static bool rtl8169_do_counters(struct n
 	void __iomem *ioaddr = tp->mmio_addr;
 	dma_addr_t paddr = tp->counters_phys_addr;
 	u32 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)

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/r8169-fix-memory-corruption-on-retrieval-of-hardware-statistics.patch