linux/drivers
Benjamin Herrenschmidt 592a607bbc [POWERPC] Disable G5 NAP mode during SMU commands on U3
It appears that with the U3 northbridge, if the processor is in NAP
mode the whole time while waiting for an SMU command to complete,
then the SMU will fail.  It could be related to the weird backward
mechanism the SMU uses to get to system memory via i2c to the
northbridge that doesn't operate properly when the said bridge is
in napping along with the CPU.  That is on U3 at least, U4 doesn't
seem to be affected.

This didn't show before NO_HZ as the timer wakeup was enough to make
it work it seems, but that is no longer the case.

This fixes it by disabling NAP mode on those machines while
an SMU command is in flight.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-08 19:52:35 +11:00
..
acorn/char
acpi ACPI: fix build warning 2008-02-07 04:24:01 -05:00
amba
ata
atm
auxdisplay
base Driver core: Revert "Fix Firmware class name collision" 2008-02-07 11:31:46 -08:00
block Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
bluetooth
cdrom Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
char ipwireless: driver for PC Card 3G/UMTS modem 2008-02-07 17:19:49 -08:00
clocksource
connector
cpufreq [CPUFREQ] fix configuration help message 2008-02-06 22:57:58 -05:00
cpuidle Revert "cpuidle: build fix for non-x86" 2008-02-07 04:16:34 -05:00
crypto
dca
dio
dma
edac drivers/edac/i3000: document type promotion 2008-02-07 08:42:23 -08:00
eisa
firewire
firmware dmi: Let drivers walk the DMI table 2008-02-07 20:39:40 -05:00
gpio
hid
hwmon hwmon: (lm80) Add individual alarm files 2008-02-07 20:39:45 -05:00
i2c hwmon: Discard useless I2C driver IDs 2008-02-07 20:39:44 -05:00
ide
ieee1394
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-02-07 12:57:44 -08:00
isdn
leds leds: Add HP Jornada 6xx driver 2008-02-07 10:10:28 +00:00
lguest
macintosh [POWERPC] Disable G5 NAP mode during SMU commands on U3 2008-02-08 19:52:35 +11:00
mca
md dm raid1: report fault status 2008-02-08 02:11:39 +00:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-02-07 12:57:44 -08:00
message
mfd ASIC3 driver 2008-02-07 08:42:23 -08:00
misc [SCSI] enclosure: add support for enclosure services 2008-02-07 18:04:10 -06:00
mmc
mtd Merge git://git.infradead.org/mtd-2.6 2008-02-07 10:20:31 -08:00
net Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds 2008-02-07 09:45:14 -08:00
nubus
of
oprofile
parisc
parport
pci
pcmcia
pnp Merge branches 'release', 'bugzilla-6217', 'bugzilla-6629', 'bugzilla-6933', 'bugzilla-7186', 'bugzilla-8269', 'bugzilla-8570', 'bugzilla-9139', 'bugzilla-9277', 'bugzilla-9341', 'bugzilla-9444', 'bugzilla-9614', 'bugzilla-9643' and 'bugzilla-9644' into release 2008-02-07 03:09:43 -05:00
power Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-02-07 09:45:58 -08:00
ps3
rapidio
rtc
s390
sbus
scsi Convert SG from nopage to fault. 2008-02-07 19:09:22 -08:00
serial Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-02-07 09:02:26 -08:00
sh
sn
spi
ssb
tc
telephony
thermal
uio
usb
video Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2008-02-07 09:45:37 -08:00
virtio
w1 DS1WM: decouple host IRQ and INTR active state settings 2008-02-07 08:42:06 -08:00
watchdog
xen
zorro
Kconfig Merge branches 'release' and 'menlo' into release 2008-02-07 03:18:04 -05:00
Makefile Merge branches 'release' and 'menlo' into release 2008-02-07 03:18:04 -05:00