d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
d276eae674
freebsd-dev/sys
History
Vladimir Kondratyev d276eae674 evdev: Make open(2) and close(3) handlers sleepable. 
At the beginning of evdev there was a LOR between hardware driver's and
evdev client list locks as they were taken in different order at
driver's interrupt and evdev open()/close() handlers.

The LOR was fixed with introduction of evdev_register_mtx() function
which allowed to use a hardware driver's lock as evdev client list lock.
While this works good with PS/2 and USB, this does not work with I2C.
Unlike PS/2 and USB, I2C open()/close() handlers do unbound sleeps
while waiting for I2C bus to release and while performing IO.
This change uses epoch(9) for traversing evdev client list in interrupt
handler to avoid the LOR thus making possible to convert evdev client
list lock to sleepable sx.

While here add brief locking protocol description.

Reviewed by:	markj
Differential revision:	https://reviews.freebsd.org/D27865
2021-01-08 02:18:41 +03:00
..
amd64 amd64 nmi handler: fix comment about %ebx 2020-12-27 12:59:33 +02:00
arm evdev: Remove useless "initial value" parameter from evdev_support_abs() 2021-01-08 02:18:41 +03:00
arm64 arm64 GENERIC: sort to match amd64, to ease comparison 2021-01-07 10:01:48 -05:00
bsm Add aio_writev and aio_readv 2021-01-02 19:57:58 -07:00
cam cam: Remove Giant handling from cam_sim_alloc() 2021-01-03 11:50:31 -05:00
cddl Install dtrace.h and dependencies 2021-01-07 09:26:21 +00:00
compat Regenerate syscall files after addition of aio_writev/aio_readv 2021-01-02 19:57:58 -07:00
conf arm64: enable build of the ipmi module 2021-01-07 15:45:25 -04:00
contrib libprivatezstd: Restrict symbol visibility similar to upstream 2021-01-03 11:26:46 -08:00
crypto armv8crypto: add AES-XTS support 2021-01-07 15:35:20 -04:00
ddb ddb: Display process flags (p_flag and p_flag2) in 'show proc'. 2020-12-31 16:01:52 -08:00
dev evdev: Make open(2) and close(3) handlers sleepable. 2021-01-08 02:18:41 +03:00
dts Brand our DTS with the Linux version it was imported from 2020-10-10 07:18:51 +00:00
fs Fix vnode locking bug in fuse_vnop_copy_file_range 2021-01-03 11:16:20 -07:00
gdb gdb(4): allow bulk write of registers 2020-12-23 14:37:05 -04:00
geom geom(4): make g_newprovider_event() return if G_P_WITHER is set 2020-12-29 14:29:59 +00:00
gnu ARM64: Port FreeBSD to Nvidia Jetson TX1 and Nano. 2020-12-28 14:12:41 +01:00
i386 Honor the vm page's PG_NODUMP flag on arm and i386. 2021-01-04 16:15:42 -06:00
isa
kern vfs: fix rangelock range in vn_rdwr() for IO_APPEND 2021-01-07 13:37:35 -08:00
kgssapi State kgssapi dependency on xdr. 2020-09-17 22:29:38 +00:00
libkern arc4random(9): Integrate with RANDOM_FENESTRASX push-reseed 2020-10-10 21:48:06 +00:00
mips Handle KDB_WHY_TRAP return on arm and mips 2021-01-02 19:07:04 -04:00
modules arm64: enable build of the ipmi module 2021-01-07 15:45:25 -04:00
net iflib: ensure that tx interrupts enabled and cleanups 2021-01-07 14:07:35 -08:00
net80211 net80211: fix a typo 2020-11-04 12:07:33 +00:00
netgraph Use light-weight versions of routing lookup functions in ng_netflow. 2020-12-26 11:27:38 +00:00
netinet Refactor rt_addrmsg() and rt_routemsg(). 2021-01-07 19:38:19 +00:00
netinet6 Refactor rt_addrmsg() and rt_routemsg(). 2021-01-07 19:38:19 +00:00
netipsec Trigger soft lifetime expiration on sequence number 2020-10-16 11:27:01 +00:00
netpfil pf: Copy kif flags to userspace 2021-01-07 22:26:05 +01:00
netsmb net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
nfs nfs: clean up empty lines in .c and .h files 2020-09-01 21:25:39 +00:00
nfsclient nfs: clean up empty lines in .c and .h files 2020-09-01 21:25:39 +00:00
nfsserver nfs: Mark unused statistics variable as reserved 2020-11-18 04:35:49 +00:00
nlm nlm: clean up empty lines in .c and .h files 2020-09-01 22:14:52 +00:00
ofed Fix for referencing file via its vnode in ibore. 2020-11-02 10:44:29 +00:00
opencrypto Remove the cloned file descriptors for /dev/crypto. 2020-11-25 00:10:54 +00:00
powerpc powerpc: Fix copyin/copyout race condition 2020-12-30 23:45:44 +01:00
riscv Skip the vm.pmap.kernel_maps sysctl by default. 2020-12-18 20:41:23 +00:00
rpc Add a new "tlscertname" NFS mount option. 2020-12-23 13:42:55 -08:00
security cache: combine fast path enabled status into one flag 2021-01-06 07:28:06 +00:00
sys vfs: add vn_seqc_read_notmodify 2021-01-06 07:28:07 +00:00
teken loader: implement framebuffer console 2021-01-02 21:41:36 +02:00
tests Add small tool to invoke kernel test framework tests. 2020-09-02 09:20:40 +00:00
tools sys/tools: Add a tool for generating arm and arm64 kernel images. 2020-12-30 13:22:04 +01:00
ufs vfs: add v_irflag accessors 2021-01-03 06:50:06 +00:00
vm uma: Avoid unmapping direct-mapped slabs 2021-01-03 11:50:31 -05:00
x86 x86: stop punishing VMs with low priority for TSC timecounter 2020-12-23 12:45:15 +02:00
xdr xdr: clean up empty lines in .c and .h files 2020-09-01 22:13:28 +00:00
xen xen: allow limiting the amount of duplicated pending xenstore watches 2020-12-30 11:18:26 +01:00
Makefile