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e1000: Don't enable ASPM L1 without L0s

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Reporter noted packet loss with 82583.  NVM is down level.  The
errata docs mention disabling this, which should be the firmware
default, so I am not sure why we were enabling this bit.  Linux and
OpenBSD have the same issue, while NetBSD got it right.

Reported by:	Codin <codin@nagi.ftp.sh>
Tested by:	Codin <codin@nagi.ftp.sh>

(cherry picked from commit 2ead091715dee327b3e00bc9840e1a95827b8e82)
This commit is contained in:
Kevin Bowling 2025-11-20 22:47:03 -07:00 committed by Franco Fichtner
parent ab3af4b390
commit dd9dad83b1
1 changed files with 2 additions and 1 deletions
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3
sys/dev/e1000/e1000_82571.c
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@ -1118,7 +1118,8 @@ static s32 e1000_init_hw_82571(struct e1000_hw *hw)
case e1000_82574:
case e1000_82583:
reg_data = E1000_READ_REG(hw, E1000_GCR);
reg_data |= E1000_GCR_L1_ACT_WITHOUT_L0S_RX;
/* 82574 Errata 25, 82583 Errata 12 */
reg_data &= ~E1000_GCR_L1_ACT_WITHOUT_L0S_RX;
E1000_WRITE_REG(hw, E1000_GCR, reg_data);
break;
default: