hang on QEMU after ATA probe

[Robert Millan]

After the ATA probe phase, build from 9-CURRENT (MALTA flavour) gets
stuck in QEMU but not in GXEMUL.  On GXEMUL it proceeds to "Trying to
mount root" message while on QEMU it doesn't.

Debug messages from ATA probe are a bit different:

--- GXEMUL      2011-07-19 17:46:18.548381982 +0200
+++ QEMU        2011-07-19 17:45:26.248582706 +0200
@@ -2,8 +2,8 @@
 ata0: stat0=0x00 err=0x00 lsb=0x00 msb=0x00
 ata0: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
 ata0: reset tp2 stat0=00 stat1=00 devices=0x0
-ata1: reset tp1 mask=03 ostat0=00 ostat1=00
-ata1: stat0=0x00 err=0x00 lsb=0x00 msb=0x00
-ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
-ata1: reset tp2 stat0=00 stat1=00 devices=0x0
-Trying to mount root from ufs:ada0s1a []...
+ata1: reset tp1 mask=03 ostat0=50 ostat1=00
+ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
+ata1: stat1=0x00 err=0x00 lsb=0xff msb=0xff
+ata1: reset tp2 stat0=00 stat1=00 devices=0x10000
+(aprobe1:ata1:0:0:0): SIGNATURE: eb14

Any idea what's going on?

-- 
Robert Millan