kernel: move e1000e patches to backports

They're already in linux.git, so they shouldn't be in pending.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
(cherry picked from commit 14b6c725411dfb3e44242bea3b000a1f58b52235)

1 files changed, 131 insertions, 0 deletions

diff --git a/target/linux/generic/backport-4.14/700-4-6-e1000e-Avoid-missed-interrupts-following-ICR-read.diff b/target/linux/generic/backport-4.14/700-4-6-e1000e-Avoid-missed-interrupts-following-ICR-read.diff
new file mode 100644
index 0000000000..f218f34d29
--- /dev/null
+++ b/target/linux/generic/backport-4.14/700-4-6-e1000e-Avoid-missed-interrupts-following-ICR-read.diff
@@ -0,0 +1,131 @@
+From patchwork Mon Mar  5 21:40:28 2018
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [net,v2,4/6] e1000e: Avoid missed interrupts following ICR read
+X-Patchwork-Submitter: "Kirsher, Jeffrey T" <jeffrey.t.kirsher@intel.com>
+X-Patchwork-Id: 881771
+X-Patchwork-Delegate: davem@davemloft.net
+Message-Id: <20180305214030.25141-5-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 13:40:28 -0800
+From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
+List-Id: <netdev.vger.kernel.org>
+
+From: Benjamin Poirier <bpoirier@suse.com>
+
+The 82574 specification update errata 12 states that interrupts may be
+missed if ICR is read while INT_ASSERTED is not set. Avoid that problem by
+setting all bits related to events that can trigger the Other interrupt in
+IMS.
+
+The Other interrupt is raised for such events regardless of whether or not
+they are set in IMS. However, only when they are set is the INT_ASSERTED
+bit also set in ICR.
+
+By doing this, we ensure that INT_ASSERTED is always set when we read ICR
+in e1000_msix_other() and steer clear of the errata. This also ensures that
+ICR will automatically be cleared on read, therefore we no longer need to
+clear bits explicitly.
+
+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/defines.h | 21 ++++++++++++++++++++-
+ drivers/net/ethernet/intel/e1000e/netdev.c  | 11 ++++-------
+ 2 files changed, 24 insertions(+), 8 deletions(-)
+
+--- a/drivers/net/ethernet/intel/e1000e/defines.h
++++ b/drivers/net/ethernet/intel/e1000e/defines.h
+@@ -400,6 +400,10 @@
+ #define E1000_ICR_RXDMT0        0x00000010 /* Rx desc min. threshold (0) */
+ #define E1000_ICR_RXO           0x00000040 /* Receiver Overrun */
+ #define E1000_ICR_RXT0          0x00000080 /* Rx timer intr (ring 0) */
++#define E1000_ICR_MDAC          0x00000200 /* MDIO Access Complete */
++#define E1000_ICR_SRPD          0x00010000 /* Small Receive Packet Detected */
++#define E1000_ICR_ACK           0x00020000 /* Receive ACK Frame Detected */
++#define E1000_ICR_MNG           0x00040000 /* Manageability Event Detected */
+ #define E1000_ICR_ECCER         0x00400000 /* Uncorrectable ECC Error */
+ /* If this bit asserted, the driver should claim the interrupt */
+ #define E1000_ICR_INT_ASSERTED	0x80000000
+@@ -407,7 +411,7 @@
+ #define E1000_ICR_RXQ1          0x00200000 /* Rx Queue 1 Interrupt */
+ #define E1000_ICR_TXQ0          0x00400000 /* Tx Queue 0 Interrupt */
+ #define E1000_ICR_TXQ1          0x00800000 /* Tx Queue 1 Interrupt */
+-#define E1000_ICR_OTHER         0x01000000 /* Other Interrupts */
++#define E1000_ICR_OTHER         0x01000000 /* Other Interrupt */
+ 
+ /* PBA ECC Register */
+ #define E1000_PBA_ECC_COUNTER_MASK  0xFFF00000 /* ECC counter mask */
+@@ -431,12 +435,27 @@
+ 	E1000_IMS_RXSEQ  |    \
+ 	E1000_IMS_LSC)
+ 
++/* These are all of the events related to the OTHER interrupt.
++ */
++#define IMS_OTHER_MASK ( \
++	E1000_IMS_LSC  | \
++	E1000_IMS_RXO  | \
++	E1000_IMS_MDAC | \
++	E1000_IMS_SRPD | \
++	E1000_IMS_ACK  | \
++	E1000_IMS_MNG)
++
+ /* Interrupt Mask Set */
+ #define E1000_IMS_TXDW      E1000_ICR_TXDW      /* Transmit desc written back */
+ #define E1000_IMS_LSC       E1000_ICR_LSC       /* Link Status Change */
+ #define E1000_IMS_RXSEQ     E1000_ICR_RXSEQ     /* Rx sequence error */
+ #define E1000_IMS_RXDMT0    E1000_ICR_RXDMT0    /* Rx desc min. threshold */
++#define E1000_IMS_RXO       E1000_ICR_RXO       /* Receiver Overrun */
+ #define E1000_IMS_RXT0      E1000_ICR_RXT0      /* Rx timer intr */
++#define E1000_IMS_MDAC      E1000_ICR_MDAC      /* MDIO Access Complete */
++#define E1000_IMS_SRPD      E1000_ICR_SRPD      /* Small Receive Packet */
++#define E1000_IMS_ACK       E1000_ICR_ACK       /* Receive ACK Frame Detected */
++#define E1000_IMS_MNG       E1000_ICR_MNG       /* Manageability Event */
+ #define E1000_IMS_ECCER     E1000_ICR_ECCER     /* Uncorrectable ECC Error */
+ #define E1000_IMS_RXQ0      E1000_ICR_RXQ0      /* Rx Queue 0 Interrupt */
+ #define E1000_IMS_RXQ1      E1000_ICR_RXQ1      /* Rx Queue 1 Interrupt */
+--- a/drivers/net/ethernet/intel/e1000e/netdev.c
++++ b/drivers/net/ethernet/intel/e1000e/netdev.c
+@@ -1910,16 +1910,12 @@ static irqreturn_t e1000_msix_other(int
+ 	struct net_device *netdev = data;
+ 	struct e1000_adapter *adapter = netdev_priv(netdev);
+ 	struct e1000_hw *hw = &adapter->hw;
+-	u32 icr;
+-
+-	icr = er32(ICR);
+-	ew32(ICR, E1000_ICR_OTHER);
++	u32 icr = er32(ICR);
+ 
+ 	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;
+ 		/* guard against interrupt when we're going down */
+ 		if (!test_bit(__E1000_DOWN, &adapter->state))
+@@ -1927,7 +1923,7 @@ static irqreturn_t e1000_msix_other(int
+ 	}
+ 
+ 	if (!test_bit(__E1000_DOWN, &adapter->state))
+-		ew32(IMS, E1000_IMS_OTHER);
++		ew32(IMS, E1000_IMS_OTHER | IMS_OTHER_MASK);
+ 
+ 	return IRQ_HANDLED;
+ }
+@@ -2254,7 +2250,8 @@ static void e1000_irq_enable(struct e100
+ 
+ 	if (adapter->msix_entries) {
+ 		ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
+-		ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
++		ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER |
++		     IMS_OTHER_MASK);
+ 	} else if (hw->mac.type >= e1000_pch_lpt) {
+ 		ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
+ 	} else {