diff options
author | tackerman <tackerman@FreeBSD.org> | 2005-01-01 19:57:23 +0000 |
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committer | tackerman <tackerman@FreeBSD.org> | 2005-01-01 19:57:23 +0000 |
commit | e6938cd35d0f3206663c11e02de0c50acddbe157 (patch) | |
tree | c10a2823c09d8129730b34aadc041ead39acd2b5 /sys/dev/em | |
parent | e01f208ae1e85d836cd223222bf74630a7e164cb (diff) | |
download | FreeBSD-src-e6938cd35d0f3206663c11e02de0c50acddbe157.zip FreeBSD-src-e6938cd35d0f3206663c11e02de0c50acddbe157.tar.gz |
Corrected a workaround that should only be applied to one adapter. Workaround
was causing device hangs when incorrectly applied to other adapters.
PR: kern/66634
Diffstat (limited to 'sys/dev/em')
-rw-r--r-- | sys/dev/em/if_em.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sys/dev/em/if_em.c b/sys/dev/em/if_em.c index 6cf1a7f..2b233bb 100644 --- a/sys/dev/em/if_em.c +++ b/sys/dev/em/if_em.c @@ -3005,8 +3005,20 @@ em_enable_intr(struct adapter * adapter) static void em_disable_intr(struct adapter *adapter) { - E1000_WRITE_REG(&adapter->hw, IMC, - (0xffffffff & ~E1000_IMC_RXSEQ)); + /* + * The first version of 82542 had an errata where when link was forced it + * would stay up even up even if the cable was disconnected. Sequence errors + * were used to detect the disconnect and then the driver would unforce the link. + * This code in the in the ISR. For this to work correctly the Sequence error + * interrupt had to be enabled all the time. + */ + + if (adapter->hw.mac_type == em_82542_rev2_0) + E1000_WRITE_REG(&adapter->hw, IMC, + (0xffffffff & ~E1000_IMC_RXSEQ)); + else + E1000_WRITE_REG(&adapter->hw, IMC, + 0xffffffff); return; } |