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ac8f374abf
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Ian Lepore ac8f374abf Fix a bug introduced with recursive bus ownership support in r321584. 
The recursive ownership support added in r321584 was unconditionally in
effect all the time -- whenever a given i2c slave device instance tried to
lock the i2c bus for exclusive use when it already owned the bus, the call
returned immediately without waiting.  However, many i2c slave drivers use
bus ownership to enforce that only a single thread at a time can be using
the slave device.  The recursive locking changes broke this use case.

Now there is a new flag, IIC_RECURSIVE, which can be mixed in with the
other flags passed to iicbus_acquire_bus() to allow drivers to indicate
when recursive locking is desired.  Using the flag implies that the driver
is managing concurrent access to the device by different threads in some way.

This immediately fixes all existing i2c slave drivers except for the two
i2c RTC drivers which use the recursive locking feature; those will be
fixed in a followup commit.
2018-01-23 23:30:19 +00:00
..
amd64 Use BSD-2-Clause-FreeBSD license on linux_support.s 2018-01-23 20:35:43 +00:00
arm Add skeleton manual page for bcm283x_pwm 2018-01-22 07:43:54 +00:00
arm64 Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
bsm sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
cam This comment is bogus. This is a legit release. 2018-01-22 17:47:49 +00:00
cddl MFV r328253: 8835 Speculative prefetch in ZFS not working for misaligned reads 2018-01-22 05:57:14 +00:00
compat Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
conf Convert extres/phy to kobj model. 2018-01-20 17:02:17 +00:00
contrib libnv: Use mallocarray(9) for the nv_calloc. 2018-01-19 14:50:53 +00:00
crypto Add ccp(4): experimental driver for AMD Crypto Co-Processor 2018-01-18 22:01:30 +00:00
ddb Implement 'domainset', a cpuset based NUMA policy mechanism. This allows 2018-01-12 22:48:23 +00:00
dev Fix a bug introduced with recursive bus ownership support in r321584. 2018-01-23 23:30:19 +00:00
dts Add a skeleton Clock Manager for RPi2/3, and use that from pwm 2018-01-22 07:10:30 +00:00
fs extfs: Remove unused variables. 2018-01-23 14:17:04 +00:00
gdb sys/gdb: further adoption of SPDX licensing ID tags. 2017-11-27 15:16:59 +00:00
geom Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
gnu Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
i386 Use BSD-2-Clause-FreeBSD license on linux_support.s 2018-01-23 20:35:43 +00:00
isa On further testing on actual machines with this hardware, we should 2017-12-30 08:16:31 +00:00
kern Forgot to sort here in r328238. 2018-01-22 02:26:10 +00:00
kgssapi sys/kgssapi: general adoption of SPDX licensing ID tags. 2017-11-27 15:49:00 +00:00
libkern SPDX: fix wrong license ID tag in libkern. 2017-12-28 01:20:30 +00:00
mips Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
modules Forgot to add the skeleton BCM283x Clock Manager 2018-01-22 08:33:59 +00:00
net Increment the route table gen count after a modify 2018-01-23 03:15:44 +00:00
net80211 net80211: sanitize input for ieee80211_output() 2017-12-30 00:40:34 +00:00
netgraph Revert r327828, r327949, r327953, r328016-r328026, r328041: 2018-01-21 15:42:36 +00:00
netinet Reduce code duplication for inpcb route caching 2018-01-23 03:15:39 +00:00
netinet6 sys/netinet6: fix typos in comments. No functional change. 2018-01-23 19:40:05 +00:00
netipsec Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
netpfil Unsign some values related to allocation. 2018-01-22 02:08:10 +00:00
netsmb Unsign some values related to allocation. 2018-01-22 02:08:10 +00:00
nfs Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
nfsclient sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
nfsserver sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
nlm Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
ofed sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
opencrypto Split crp_buf into a union. 2018-01-16 19:41:18 +00:00
powerpc PowerNV: send MSI_EOI always after MSI unmask 2018-01-23 08:07:00 +00:00
riscv Remove SFBUF_OPTIONAL_DIRECT_MAP and such hacks, replacing them across the 2018-01-19 17:46:31 +00:00
rpc Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
security Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
sparc64 Remove SFBUF_OPTIONAL_DIRECT_MAP and such hacks, replacing them across the 2018-01-19 17:46:31 +00:00
sys copyright.h: Update license text to 'THE AUTHOR' 2018-01-23 20:38:03 +00:00
teken sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
tests
tools embed_mfs: correctly test grep return value 2018-01-03 19:22:10 +00:00
ufs ufs: use mallocarray(9). 2018-01-17 18:18:33 +00:00
vm Assign map->header values to avoid boundary checks. 2018-01-20 12:19:02 +00:00
x86 Unsign some values related to allocation. 2018-01-22 02:08:10 +00:00
xdr sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
xen sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
Makefile Move sys/boot to stand. Fix all references to new location 2017-11-14 23:02:19 +00:00