ATA: driver bug: Unable to set devclass

[Alexander Motin]

Andriy Gapon wrote:
> Since one of the recent updates (not sure which revision though) I started to get
> "Unable to set devclass" messages in boot dmesg.  I'd say that I see the message
> every other boot, i.e. not always.
> 
> I added some more debug code there and here's a tack trace:
> 
> driver bug: Unable to set devclass (child = 0xffffff00070d0100, devname: (null))
> #0 0xffffffff803ae127 at device_probe_child+0x127
> #1 0xffffffff803ae40c at device_probe+0x7c
> #2 0xffffffff803ae4a1 at device_probe_and_attach+0x11
> #3 0xffffffff803ae56a at bus_generic_attach+0x1a
> #4 0xffffffff801df93c at ata_identify+0x2ec
> #5 0xffffffff801dfcdb at ata_boot_attach+0x6b
> #6 0xffffffff803a8577 at run_interrupt_driven_config_hooks+0xf7
> #7 0xffffffff803a8993 at boot_run_interrupt_driven_config_hooks+0x23
> #8 0xffffffff8032f227 at mi_startup+0xc7
> #9 0xffffffff801719cc at btext+0x2c
> 
>>From kgdb:
> (kgdb) p *(device_t)0xffffff00070d0100
> $1 = {ops = 0xffffff0001b07000, link = {tqe_next = 0xffffff0001a65100, tqe_prev =
> 0xffffff0006eb0130}, devlink = {tqe_next = 0xffffff0001a65100, tqe_prev =
> 0xffffff000706e318},
>   parent = 0xffffff0006eb0100, children = {tqh_first = 0xffffff0001a5b200,
> tqh_last = 0xffffff0001a5b208}, driver = 0xffffffff8079bc80, devclass =
> 0xffffff0001add080, unit = 0,
>   nameunit = 0xffffff00070931a0 "ad0", desc = 0xffffff000711e7c0
> "ST3320620A/3.AAF", busy = 0, state = DS_ATTACHED, devflags = 0, flags = 89, order
> = 0, ivars = 0xffffff000711e5e0,
>   softc = 0xffffff000706a400, sysctl_ctx = {tqh_first = 0xffffff000711e600,
> tqh_last = 0xffffff000711e708}, sysctl_tree = 0xffffff00070f9500}
> 
> Apparently sometimes something happens too soon? :-)

What controller is there? Any other differences/interesting things in
verbose dmesg? Any new "CONNECT requested" messages or anything else?

-- 
Alexander Motin