Patch "igb: Workaround for igb i210 firmware issue" has been added to the 4.4-stable tree

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

    igb: Workaround for igb i210 firmware issue

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:
     igb-workaround-for-igb-i210-firmware-issue.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 <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Tue Mar 28 13:59:27 CEST 2017
From: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Date: Sat, 25 Mar 2017 21:48:02 +0530
Subject: igb: Workaround for igb i210 firmware issue
To: stable@xxxxxxxxxxxxxxx
Cc: Chris J Arges <christopherarges@xxxxxxxxx>, Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>, Sasha Levin <alexander.levin@xxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Message-ID: <1490458699-24484-3-git-send-email-sumit.semwal@xxxxxxxxxx>

From: Sumit Semwal <sumit.semwal@xxxxxxxxxx>


From: Chris J Arges <christopherarges@xxxxxxxxx>

[ Upstream commit 4e684f59d760a2c7c716bb60190783546e2d08a1 ]

Sometimes firmware may not properly initialize I347AT4_PAGE_SELECT causing
the probe of an igb i210 NIC to fail. This patch adds an addition zeroing
of this register during igb_get_phy_id to workaround this issue.

Thanks for Jochen Henneberg for the idea and original patch.

Signed-off-by: Chris J Arges <christopherarges@xxxxxxxxx>
Tested-by: Aaron Brown <aaron.f.brown@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/intel/igb/e1000_phy.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ethernet/intel/igb/e1000_phy.c
+++ b/drivers/net/ethernet/intel/igb/e1000_phy.c
@@ -77,6 +77,10 @@ s32 igb_get_phy_id(struct e1000_hw *hw)
 	s32 ret_val = 0;
 	u16 phy_id;
 
+	/* ensure PHY page selection to fix misconfigured i210 */
+	if (hw->mac.type == e1000_i210)
+		phy->ops.write_reg(hw, I347AT4_PAGE_SELECT, 0);
+
 	ret_val = phy->ops.read_reg(hw, PHY_ID1, &phy_id);
 	if (ret_val)
 		goto out;


Patches currently in stable-queue which might be from sumit.semwal@xxxxxxxxxx are

queue-4.4/pci-add-comments-about-rom-bar-updating.patch
queue-4.4/acpi-blacklist-make-dell-latitude-3350-ethernet-work.patch
queue-4.4/s390-zcrypt-introduce-cex6-toleration.patch
queue-4.4/block-allow-write_same-commands-with-the-sg_io-ioctl.patch
queue-4.4/pci-do-any-vf-bar-updates-before-enabling-the-bars.patch
queue-4.4/x86-hyperv-handle-unknown-nmis-on-one-cpu-when-unknown_nmi_panic.patch
queue-4.4/serial-8250_pci-detach-low-level-driver-during-pci-error-recovery.patch
queue-4.4/xen-do-not-re-use-pirq-number-cached-in-pci-device-msi-msg-data.patch
queue-4.4/pci-separate-vf-bar-updates-from-standard-bar-updates.patch
queue-4.4/pci-ignore-bar-updates-on-virtual-functions.patch
queue-4.4/pci-update-bars-using-property-bits-appropriate-for-type.patch
queue-4.4/vfio-spapr-postpone-allocation-of-userspace-version-of-tce-table.patch
queue-4.4/pci-don-t-update-vf-bars-while-vf-memory-space-is-enabled.patch
queue-4.4/igb-workaround-for-igb-i210-firmware-issue.patch
queue-4.4/pci-remove-pci_resource_bar-and-pci_iov_resource_bar.patch
queue-4.4/pci-decouple-ioresource_rom_enable-and-pci_rom_address_enable.patch
queue-4.4/acpi-blacklist-add-_rev-quirks-for-dell-precision-5520-and-3520.patch
queue-4.4/igb-add-i211-to-i210-phy-workaround.patch
queue-4.4/uvcvideo-uvc_scan_fallback-for-webcams-with-broken-chain.patch



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