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e1000e: Do not auto-clear ICR bits which aren't set in EIAC 

The spec does not justify clearing of any E1000_ICR_OTHER_CAUSES when
E1000_ICR_OTHER is set in EIAC. In fact, removing this code fixes the
issue the Linux driver runs into since 4aea7a5c5e94 ("e1000e: Avoid
receiver overrun interrupt bursts") and was worked around by
745d0bd3af99 ("e1000e: Remove Other from EIAC").

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jan Kiszka 2018-04-01 23:17:55 +02:00 committed by Jason Wang
parent 8b43f964f9
commit 2285a00c11
1 changed files with 0 additions and 4 deletions
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4
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)
effective_eiac = core->mac[EIAC] & cause;
if (effective_eiac == E1000_ICR_OTHER) {
effective_eiac |= E1000_ICR_OTHER_CAUSES;
}
core->mac[ICR] &= ~effective_eiac;
if (!(core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) {