Date: Mon, 4 Aug 2008 21:03:06 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/iicbus iic.c iicbus.c iicbus.h iiconf.c iicsmb.c Message-ID: <200808042103.m74L3JSH056295@repoman.freebsd.org>
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jhb 2008-08-04 21:03:06 UTC
FreeBSD src repository
Modified files:
sys/dev/iicbus iic.c iicbus.c iicbus.h iiconf.c iicsmb.c
Log:
SVN rev 181304 on 2008-08-04 21:03:06Z by jhb
Add locking to the core iicbus(4) drivers:
- Add an sx lock to the iic(4) driver to serialize open(), close(), read(),
and write and to protect sc_addr and sc_count in the softc.
- Use cdev->si_drv1 instead of using the minor number of the cdev to
lookup the softc via newbus in iic(4).
- Store the device_t in the softc to avoid a similar detour via minor
numbers in iic(4).
- Only add at most one instance of iic(4) and iicsmb(4) to each iicbus(4)
instance, and do it in the child driver.
- Add a mutex to the iicbus(4) softc to synchronize the request/release bus
stuff.
- Use __BUS_ACCESSOR() for IICBUS_ACCESSOR() instead of rolling our own.
- Add a mutex to the iicsmb(4) softc to protect softc state updated in the
interrupt handler.
- Remove Giant from all the smbus methods in iicsmb(4) now that all the
iicbus(4) backend is locked.
Revision Changes Path
1.40 +81 -40 src/sys/dev/iicbus/iic.c
1.25 +6 -8 src/sys/dev/iicbus/iicbus.c
1.8 +9 -6 src/sys/dev/iicbus/iicbus.h
1.18 +19 -15 src/sys/dev/iicbus/iiconf.c
1.16 +13 -37 src/sys/dev/iicbus/iicsmb.c
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