ATA? related trouble with r300299

[Oleg V. Nauman]

 I have faced the issue with fresh CURRENT stopped to boot on my old desktop 
after update to r300299
Verbose boot shows the endless cycle of 

ata2: SATA reset: ports status=0x05
ata2: reset tp1 mask=03 ostat0=50 ostat1=50
ata2: stat0=0x50 err=0x01 lsb=0x00 msb=0x00
ata2: stat1=0x50 err=0x01 lsb=0x00 msb=0x00
ata2: reset tp2 stat0=50 stat1=50 devices=0x3
messages logged to console.

Below is the relevant portion of ATA controller/devices probed/attached during 
the boot:

atapci0: <Intel ICH7 UDMA100 controller> port 
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 31.1 on pci0
ata0: <ATA channel> at channel 0 on atapci0
atapci1: <Intel ICH7 SATA300 controller> port 0xd080-0xd087, 0xd000-0xd003, 
0xcc00-0xcc07,0xc880-0xc883,0xc800-0xc80f irq 19 at device 31.2 on pci0
ata2: <ATA channel> at channel 0 on atapci1
ata3: <ATA channel> at channel 1 on atapci1
ada0 at ata2 bus 0 scbus1 target 0 lun 0
ada0: <SAMSUNG HD200HJ KF100-06> ATA-7 SATA 2.x device
ada1 at ata2 bus 0 scbus1 target 1 lun 0
ada1: <ST500DM002-1BC142 JC4B> ATA8-ACS SATA 3.x device
cd0 at ata0 bus 0 scbus0 target 0 lun 0
cd0: <_NEC DVD_RW ND-3570A 1.11> Removable CD-ROM SCSI device


Thank you