recent Maestro messages.

[Julian Elischer]

Recently the MAestro attach code has started to spew out the following during boot.

someone who knows pcm_addchan() should look to see it the locking in agg_attach()
can be adjusted to avoid this error safely.

=====================

malloc(M_WAITOK) of "256", forcing M_NOWAIT with the following non-sleepable loc
ks held:
exclusive sleep mutex ESS Technology Maestro-2E (hardware status lock) r = 0 (0x
c228be28) locked @ /usr/src/sys/modules/sound/driver/maestro/../../../../dev/sou
nd/pci/maestro.c:270
KDB: stack backtrace:
kdb_backtrace(1,e0,c10653c0,4,c0c209ec) at kdb_backtrace+0x29
witness_warn(5,0,c089b071,c0840681,e0) at witness_warn+0x192
uma_zalloc_arg(c10653c0,0,502) at uma_zalloc_arg+0x41
malloc(d8,c0907860,502,c0c20a38,c062efe8) at malloc+0xb2
devfs_alloc(c22c3800,0,c22c3780,c0c20a60,c062f0d4) at devfs_alloc+0x17
make_dev_credv(c0ae0420,30004,0,0,0) at make_dev_credv+0x34
make_dev(c0ae0420,30004,0,0,1b6) at make_dev+0x20
pcm_chn_add(c228bc00,c22fad80,c228be00,0,0) at pcm_chn_add+0x14e
pcm_addchan(c22ba600,1,c0ac4ca0,c228be00,c228be28) at pcm_addchan+0x36
agg_attach(c22ba600) at agg_attach+0x553
device_attach(c22ba600,c22ba880,c22ba600,c22ba380,0) at device_attach+0x58
device_probe_and_attach(c22ba600) at device_probe_and_attach+0xe0
bus_generic_attach(c22ba380,6,c229d7c0,1,c0b2c39c) at bus_generic_attach+0x16
acpi_pci_attach(c22ba380) at acpi_pci_attach+0xd0
device_attach(c22ba380,c228acf0,c22ba380,0,c223ea80) at device_attach+0x58
device_probe_and_attach(c22ba380) at device_probe_and_attach+0xe0
bus_generic_attach(c223ea80,c223ea80,0,c229d7c0,c22b5480) at bus_generic_attach+
0x16
acpi_pcib_attach(c223ea80,c22b5494,0,c0c20c58,c066e3cc) at acpi_pcib_attach+0x12
f
acpi_pcib_acpi_attach(c223ea80) at acpi_pcib_acpi_attach+0xcf
device_attach(c223ea80,c0c20ca0,c223ea80,c22b2c80,c223d600) at device_attach+0x5
8
device_probe_and_attach(c223ea80) at device_probe_and_attach+0xe0
bus_generic_attach(c223d600,103f,1016,c22a3468,4) at bus_generic_attach+0x16
acpi_attach(c223d600) at acpi_attach+0x631
device_attach(c223d600,0,c223d600,c223dd00,0) at device_attach+0x58
device_probe_and_attach(c223d600) at device_probe_and_attach+0xe0
bus_generic_attach(c223dd00,c223dd00,c223dd00,c0c20d40,c066a624) at bus_generic_
attach+0x16
nexus_attach(c223dd00) at nexus_attach+0x13
device_attach(c223dd00,c0951fb4,c223dd00,c0923ed0,c28000) at device_attach+0x58
device_probe_and_attach(c223dd00) at device_probe_and_attach+0xe0
root_bus_configure(c0c20d88,c062b006,0,c1ec00,c1e000) at root_bus_configure+0x16
configure(0,c1ec00,c1e000,0,c0446ce5) at configure+0x9
mi_startup() at mi_startup+0x96
begin() at begin+0x2c