r348164 added code to iicbus_request_bus/iicbus_release_bus to automatically call device_busy()/device_unbusy() as part of aquiring exclusive use of the bus (so modules can't be unloaded while the bus is exclusively owned and/or IO is in progress). That broke the ability to do i2c IO from a slave device probe method, because the slave isn't attached yet, so calling device_busy() triggers a sanity-check panic for trying to busy a non-attached device. Now we check whether the device status is < DS_ATTACHING, and if so we busy the iicbus rather than the slave device. I think this leaves a small window where a module could be unloaded while probing is in progress. But I think that's true of all devices, and probably should be fixed by introducing a DS_PROBING state for devices, and handling that at various points in the newbus code. |
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bin | ||
cddl | ||
contrib | ||
crypto | ||
etc | ||
gnu | ||
include | ||
kerberos5 | ||
lib | ||
libexec | ||
release | ||
rescue | ||
sbin | ||
secure | ||
share | ||
stand | ||
sys | ||
targets | ||
tests | ||
tools | ||
usr.bin | ||
usr.sbin | ||
.arcconfig | ||
.arclint | ||
.cirrus.yml | ||
.clang-format | ||
.gitattributes | ||
.gitignore | ||
COPYRIGHT | ||
LOCKS | ||
MAINTAINERS | ||
Makefile | ||
Makefile.inc1 | ||
Makefile.libcompat | ||
Makefile.sys.inc | ||
ObsoleteFiles.inc | ||
README | ||
README.md | ||
UPDATING |
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