Patch "ixgbe: Reduce I2C retry count on X550 devices" has been added to the 4.9-stable tree

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

ixgbe: Reduce I2C retry count on X550 devices

to the 4.9-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:
ixgbe-reduce-i2c-retry-count-on-x550-devices.patch
and it can be found in the queue-4.9 subdirectory.

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

From: Tony Nguyen <[email protected]>
Date: Thu, 10 Nov 2016 09:57:29 -0800
Subject: ixgbe: Reduce I2C retry count on X550 devices

From: Tony Nguyen <[email protected]>

[ Upstream commit 3f0d646b720d541309b11e190db58086f446f41e ]

A retry count of 10 is likely to run into problems on X550 devices that have to detect and reset unresponsive CS4227 devices. So, reduce the I2C retry count to 3 for X550 and above. This should avoid any possible regressions in existing devices.

---
 drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -113,7 +113,7 @@ static s32 ixgbe_read_i2c_combined_gener
 					       u16 reg, u16 *val, bool lock)
 {
 	u32 swfw_mask = hw->phy.phy_semaphore_mask;
-	int max_retry = 10;
+	int max_retry = 3;
 	int retry = 0;
 	u8 csum_byte;
 	u8 high_bits;

@@ -1764,6 +1764,8 @@ static s32 ixgbe_read_i2c_byte_generic_i
 	u32 swfw_mask = hw->phy.phy_semaphore_mask;
 	bool nack = true;
 
+	if (hw->mac.type >= ixgbe_mac_X550)
+		max_retry = 3;
 	if (ixgbe_is_sfp_probe(hw, byte_offset, dev_addr))
 		max_retry = IXGBE_SFP_DETECT_RETRIES;
 

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

queue-4.9/ixgbe-reduce-i2c-retry-count-on-x550-devices.patch queue-4.9/ixgbe-fix-reporting-of-100mb-capability.patch