df2420rig: port 0 drained - holding 31 ata_xfers, ap_ccb_free is now EMPTY
Fatal user address access from kernel mode from ahcipoc at ffffffff80305609


Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic id = 1
fault virtual address	= 0x60
fault code		= supervisor write data, page not present
instruction pointer	= 0x8:0xffffffff80305609
stack pointer	        = 0x10:0xfffff80118303588
frame pointer	        = 0x10:0xfffff801183035c8
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 820
current thread          = pri 6 
kernel: type 12 trap, code=2

CPU1 stopping CPUs: 0x0000003d
 stopped
Stopped at      ahci_xpt_scsi_disk_io+0x8f9:    movl    $0x1,0x60(%r12)
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