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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-05-27 12:53:02 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-28 11:14:01 -0700
commitb16eeb47292597a8bf3ad53fdaf1f727f57bd8e4 (patch)
tree93325bd2b4dd53e3064408c997f626b565c4423f /arch/ppc/syslib/open_pic.c
parent[PATCH] x86: fix smp_num_siblings on buggy BIOSes (diff)
downloadlinux-dev-b16eeb47292597a8bf3ad53fdaf1f727f57bd8e4.tar.xz
linux-dev-b16eeb47292597a8bf3ad53fdaf1f727f57bd8e4.zip
[PATCH] ppc32: Fix cpufreq vs. sleep issue
Recent kernels occasionally trigger a PMU timeout on some mac laptops, typically on wakeup from sleep. This seem to be caused by either a too big latency caused by the cpufreq switch on wakeup from sleep or by an interrupt beeing lost due to the reset of the interrupt controller done during wakeup. This patch makes that code more robust by stopping PMU auto poll activity around cpufreq changes on machines that use the PMU for such changes (long latency switching involving a CPU hard reset and flush of all caches) and by removing the reset of the open pic interrupt controller on wakeup (that can cause the loss of an interrupt and Darwin doesn't do it, so it must not be necessary). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
-rw-r--r--arch/ppc/syslib/open_pic.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/ppc/syslib/open_pic.c b/arch/ppc/syslib/open_pic.c
index 9d4ed68b5804..000ba47c67cb 100644
--- a/arch/ppc/syslib/open_pic.c
+++ b/arch/ppc/syslib/open_pic.c
@@ -275,7 +275,7 @@ static void __init openpic_enable_sie(void)
}
#endif
-#if defined(CONFIG_EPIC_SERIAL_MODE) || defined(CONFIG_PM)
+#if defined(CONFIG_EPIC_SERIAL_MODE)
static void openpic_reset(void)
{
openpic_setfield(&OpenPIC->Global.Global_Configuration0,
@@ -993,8 +993,6 @@ int openpic_resume(struct sys_device *sysdev)
return 0;
}
- openpic_reset();
-
/* OpenPIC sometimes seem to need some time to be fully back up... */
do {
openpic_set_spurious(OPENPIC_VEC_SPURIOUS);