kernel: add pending e1000e fixes

The previous round of fixes for the 82574 chip cause an issue with
emulated e1000e devices in VMware ESXi 6.5. It also contains changes
that are not strictly necessary. These patches fix the issues introduced
in the previous series, revert the unnecessary changes to avoid
unforeseen fallout, and avoid a case where interrupts can be missed.

The final two patches of this series are already in the kernel, so no
need to include them here.

Patchwork: https://patchwork.ozlabs.org/cover/881776/

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 50 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.14/191-3-6-e1000e-Fix-queue-interrupt-re-raising-in-Other-interrupt.diff b/target/linux/generic/pending-4.14/191-3-6-e1000e-Fix-queue-interrupt-re-raising-in-Other-interrupt.diff
new file mode 100644
index 0000000000..8ad13ba69a
--- /dev/null
+++ b/target/linux/generic/pending-4.14/191-3-6-e1000e-Fix-queue-interrupt-re-raising-in-Other-interrupt.diff
@@ -0,0 +1,50 @@
+From patchwork Mon Mar  5 21:40:27 2018
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [net, v2,
+ 3/6] e1000e: Fix queue interrupt re-raising in Other interrupt
+X-Patchwork-Submitter: "Kirsher, Jeffrey T" <jeffrey.t.kirsher@intel.com>
+X-Patchwork-Id: 881775
+X-Patchwork-Delegate: davem@davemloft.net
+Message-Id: <20180305214030.25141-4-jeffrey.t.kirsher@intel.com>
+To: davem@davemloft.net
+Cc: Benjamin Poirier <bpoirier@suse.com>, netdev@vger.kernel.org,
+ nhorman@redhat.com, sassmann@redhat.com, jogreene@redhat.com,
+ Jeff Kirsher <jeffrey.t.kirsher@intel.com>
+Date: Mon,  5 Mar 2018 13:40:27 -0800
+From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
+List-Id: <netdev.vger.kernel.org>
+
+From: Benjamin Poirier <bpoirier@suse.com>
+
+Restores the ICS write for Rx/Tx queue interrupts which was present before
+commit 16ecba59bc33 ("e1000e: Do not read ICR in Other interrupt", v4.5-rc1)
+but was not restored in commit 4aea7a5c5e94
+("e1000e: Avoid receiver overrun interrupt bursts", v4.15-rc1).
+
+This re-raises the queue interrupts in case the txq or rxq bits were set in
+ICR and the Other interrupt handler read and cleared ICR before the queue
+interrupt was raised.
+
+Fixes: 4aea7a5c5e94 ("e1000e: Avoid receiver overrun interrupt bursts")
+Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
+Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
+Tested-by: Aaron Brown <aaron.f.brown@intel.com>
+Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
+---
+ drivers/net/ethernet/intel/e1000e/netdev.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/net/ethernet/intel/e1000e/netdev.c
++++ b/drivers/net/ethernet/intel/e1000e/netdev.c
+@@ -1915,6 +1915,9 @@ static irqreturn_t e1000_msix_other(int
+ 	icr = er32(ICR);
+ 	ew32(ICR, E1000_ICR_OTHER);
+ 
++	if (icr & adapter->eiac_mask)
++		ew32(ICS, (icr & adapter->eiac_mask));
++
+ 	if (icr & E1000_ICR_LSC) {
+ 		ew32(ICR, E1000_ICR_LSC);
+ 		hw->mac.get_link_status = true;