RELENG_7 ata panic on atacontrol attach

[Alexander Motin]

Dmitry Morozovsky wrote:
> On Thu, 2 Apr 2009, Alexander Motin wrote:
> 
> AM> > ata7: reset tp2 stat0=50 stat1=00 devices=0x1<ATA_MASTER>^M
> AM> > ata7-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire^M
> AM> > ata7-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=40 wire^M
> AM> > ad: ad14 already exists; skipping it^M
> AM> > ad: ad14 already exists; skipping it^M
> AM> > ^M
> AM> > ^M
> AM> > Fatal trap 12: page fault while in kernel mode^M
> AM> 
> AM> It looks alike to crash I have already fixed on CURRENT:
> AM> http://svn.freebsd.org/changeset/base/188464
> 
> Seems to be. Would you please ask re@ for MFC approval?

This is not actually a fix for original problem, but it may help to 
avoid system crash. Can you confirm that it helps you, as I haven't 
tested it on STABLE yet, I am doing it now. If it helps, I will ask re at .

-- 
Alexander Motin