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From 4b19800a747e124fed795b013c743c0297fff241 Mon Sep 17 00:00:00 2001
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From: Xiao Wang <jasowang@redhat.com>
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Date: Thu, 16 Aug 2018 08:17:06 +0100
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Subject: [PATCH 1/4] e1000e: Do not auto-clear ICR bits which aren't set in
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EIAC
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RH-Author: Xiao Wang <jasowang@redhat.com>
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Message-id: <1534407427-44794-2-git-send-email-jasowang@redhat.com>
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Patchwork-id: 81854
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O-Subject: [RHEL-8.0 qemu-kvm PATCH 1/2] e1000e: Do not auto-clear ICR bits which aren't set in EIAC
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Bugzilla: 1596024
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RH-Acked-by: wexu@redhat.com
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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From: Jan Kiszka <jan.kiszka@siemens.com>
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The spec does not justify clearing of any E1000_ICR_OTHER_CAUSES when
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E1000_ICR_OTHER is set in EIAC. In fact, removing this code fixes the
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issue the Linux driver runs into since 4aea7a5c5e94 ("e1000e: Avoid
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receiver overrun interrupt bursts") and was worked around by
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745d0bd3af99 ("e1000e: Remove Other from EIAC").
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Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit 2285a00c113469bb3e750ca4921cdb7baaae9e25)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/net/e1000e_core.c | 4 ----
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1 file changed, 4 deletions(-)
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diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
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index c93c466..9504891 100644
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--- a/hw/net/e1000e_core.c
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+++ b/hw/net/e1000e_core.c
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@@ -2022,10 +2022,6 @@ e1000e_msix_notify_one(E1000ECore *core, uint32_t cause, uint32_t int_cfg)
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effective_eiac = core->mac[EIAC] & cause;
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- if (effective_eiac == E1000_ICR_OTHER) {
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- effective_eiac |= E1000_ICR_OTHER_CAUSES;
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- }
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-
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core->mac[ICR] &= ~effective_eiac;
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if (!(core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) {
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--
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1.8.3.1
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