The ICH8M found in the MacBookPro4,1 has an known issue [1] which
locks up when enabling the periodic poll using sidpr (introduced a
``little'' while ago in r214016), making it impossible to boot.
Attached patch disables the polling and thus fixes the issue.
Br. /Rick
[1] http://www.spinics.net/lists/linux-ide/msg23487.html
--
http://rickvanderzwet.nl
Index: sys/dev/ata/chipsets/ata-intel.c
===================================================================
--- sys/dev/ata/chipsets/ata-intel.c (revision 222949)
+++ sys/dev/ata/chipsets/ata-intel.c (working copy)
@@ -366,7 +366,10 @@
smap[1] = 3;
}
}
- if (ch->flags & ATA_SATA) {
+ if (ctlr->chip->chipid == ATA_I82801HBM_S1) {
+ /* Disable polling, locks up after enabling sidpr */
+ ctlr->setmode = ata_intel_new_setmode;
+ } else if (ch->flags & ATA_SATA) {
if ((ctlr->chip->cfg1 & INTEL_ICH5)) {
ch->flags |= ATA_PERIODIC_POLL;
ch->hw.status = ata_intel_sata_status;
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