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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-07-21 18:32:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-02 10:26:41 -0700 |
| commit | 9cfd3b84f5b450e57a6ddbbf22b1a34eab6875ec (patch) | |
| tree | 0b4699ba23de5e0eef1b4f831f5a002dbb7ef3bb /arch | |
| parent | b7806456d7c10c64da49005a911ba0a4998e9d1c (diff) | |
| download | lwn-9cfd3b84f5b450e57a6ddbbf22b1a34eab6875ec.tar.gz lwn-9cfd3b84f5b450e57a6ddbbf22b1a34eab6875ec.zip | |
x86: Do not try to disable hpet if it hasn't been initialized before
commit ff4878089e1eaeac79d57878ad4ea32910fb4037 upstream.
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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -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 773afc9274a1..241c5b24b349 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -958,7 +958,7 @@ 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) { |