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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-07-21 18:32:37 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-07-23 12:53:00 +0200 |
| commit | ff4878089e1eaeac79d57878ad4ea32910fb4037 (patch) | |
| tree | 0e2f78629117a2ca1eff77c673ce364bb4cc32a6 /arch/x86/kernel/hpet.c | |
| parent | 087b255a2b43f417af83cb44e0bb02507f36b7fe (diff) | |
| download | lwn-ff4878089e1eaeac79d57878ad4ea32910fb4037.tar.gz lwn-ff4878089e1eaeac79d57878ad4ea32910fb4037.zip | |
x86: Do not try to disable hpet if it hasn't been initialized before
hpet_disable is called unconditionally on machine reboot if hpet support
is compiled in the kernel.
hpet_disable only checks if the machine is hpet capable but doesn't make
sure that hpet has been initialized.
[ tglx: Made it a one liner and removed the redundant hpet_address check ]
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Venkatesh Pallipadi <venki@google.com>
LKML-Reference: <alpine.DEB.2.00.1007211726240.22235@kaball-desktop>
Cc: stable@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/hpet.c')
| -rw-r--r-- | arch/x86/kernel/hpet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index a198b7c87a12..ba390d731175 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -964,7 +964,7 @@ fs_initcall(hpet_late_init); void hpet_disable(void) { - if (is_hpet_capable()) { + if (is_hpet_capable() && hpet_virt_address) { unsigned int cfg = hpet_readl(HPET_CFG); if (hpet_legacy_int_enabled) { |