diff options
| author | Alex Williamson <alex.williamson@hp.com> | 2007-08-13 23:49:46 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-08-15 22:20:38 +0200 |
| commit | 182fdd225de8fc3b1b721ae944fc41146a0bd812 (patch) | |
| tree | 0b9d55146bebbbbe79358f20caf7c644e695607b /arch | |
| parent | [IA64] SGI Altix : fix a force_interrupt bug on altix (diff) | |
| download | linux-182fdd225de8fc3b1b721ae944fc41146a0bd812.tar.xz linux-182fdd225de8fc3b1b721ae944fc41146a0bd812.zip | |
[IA64] Fix processor_get_freq
The core cpufreq code doesn't appear to understand returning -EAGAIN
for the get() function of the cpufreq_driver. If PAL_GET_PSTATE returns
-1, such as when running on Xen, scaling_cur_freq is happy to return
4294967285 kHz (ie. (unsigned)-11). The other drivers appear to return
0 for a failure, and doing so gives me the max frequency from
scaling_cur_frequency and "<unknown>" from cpuinfo_cur_frequency. I
believe that's the desired behavior.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/kernel/cpufreq/acpi-cpufreq.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c index 15c08d52f09f..8c6ec7070844 100644 --- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c +++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c @@ -113,10 +113,8 @@ processor_get_freq ( saved_mask = current->cpus_allowed; set_cpus_allowed(current, cpumask_of_cpu(cpu)); - if (smp_processor_id() != cpu) { - ret = -EAGAIN; + if (smp_processor_id() != cpu) goto migrate_end; - } /* processor_get_pstate gets the instantaneous frequency */ ret = processor_get_pstate(&value); @@ -125,7 +123,7 @@ processor_get_freq ( set_cpus_allowed(current, saved_mask); printk(KERN_WARNING "get performance failed with error %d\n", ret); - ret = -EAGAIN; + ret = 0; goto migrate_end; } clock_freq = extract_clock(data, value, cpu); |