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67 lines
2.7 KiB
Diff
67 lines
2.7 KiB
Diff
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From patchwork Mon Mar 5 21:40:25 2018
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [net,v2,1/6] e1000e: Remove Other from EIAC
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X-Patchwork-Submitter: "Kirsher, Jeffrey T" <jeffrey.t.kirsher@intel.com>
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X-Patchwork-Id: 881773
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X-Patchwork-Delegate: davem@davemloft.net
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Message-Id: <20180305214030.25141-2-jeffrey.t.kirsher@intel.com>
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To: davem@davemloft.net
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Cc: Benjamin Poirier <bpoirier@suse.com>, netdev@vger.kernel.org,
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nhorman@redhat.com, sassmann@redhat.com, jogreene@redhat.com,
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Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Date: Mon, 5 Mar 2018 13:40:25 -0800
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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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List-Id: <netdev.vger.kernel.org>
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From: Benjamin Poirier <bpoirier@suse.com>
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It was reported that emulated e1000e devices in vmware esxi 6.5 Build
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7526125 do not link up after commit 4aea7a5c5e94 ("e1000e: Avoid receiver
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overrun interrupt bursts", v4.15-rc1). Some tracing shows that after
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e1000e_trigger_lsc() is called, ICR reads out as 0x0 in e1000_msix_other()
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on emulated e1000e devices. In comparison, on real e1000e 82574 hardware,
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icr=0x80000004 (_INT_ASSERTED | _LSC) in the same situation.
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Some experimentation showed that this flaw in vmware e1000e emulation can
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be worked around by not setting Other in EIAC. This is how it was before
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16ecba59bc33 ("e1000e: Do not read ICR in Other interrupt", v4.5-rc1).
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Fixes: 4aea7a5c5e94 ("e1000e: Avoid receiver overrun interrupt bursts")
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Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
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Tested-by: Aaron Brown <aaron.f.brown@intel.com>
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Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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---
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drivers/net/ethernet/intel/e1000e/netdev.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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--- a/drivers/net/ethernet/intel/e1000e/netdev.c
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+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
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@@ -1914,6 +1914,8 @@ static irqreturn_t e1000_msix_other(int
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bool enable = true;
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icr = er32(ICR);
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+ ew32(ICR, E1000_ICR_OTHER);
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+
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if (icr & E1000_ICR_RXO) {
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ew32(ICR, E1000_ICR_RXO);
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enable = false;
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@@ -2036,7 +2038,6 @@ static void e1000_configure_msix(struct
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hw->hw_addr + E1000_EITR_82574(vector));
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else
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writel(1, hw->hw_addr + E1000_EITR_82574(vector));
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- adapter->eiac_mask |= E1000_IMS_OTHER;
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/* Cause Tx interrupts on every write back */
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ivar |= BIT(31);
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@@ -2261,7 +2262,7 @@ static void e1000_irq_enable(struct e100
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if (adapter->msix_entries) {
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ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
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- ew32(IMS, adapter->eiac_mask | E1000_IMS_LSC);
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+ ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
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} else if (hw->mac.type >= e1000_pch_lpt) {
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ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
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} else {
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