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Corrected a workaround that should only be applied to one adapter. Workaround

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was causing device hangs when incorrectly applied to other adapters.

PR:		kern/66634
This commit is contained in:
Tony Ackerman 2005-01-01 19:57:23 +00:00
parent 66fe651294
commit b1ffdfc7c2
1 changed files with 14 additions and 2 deletions
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16
sys/dev/em/if_em.c
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@ -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;
}