[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-4.1-testing] xen: avoid crash enabling turbo mode
# HG changeset patch # User Ian Campbell <ian.campbell@xxxxxxxxxx> # Date 1321461469 0 # Node ID 4a91cf045893035f8cfd7f97ab6c134250d8411a # Parent 98ba0aceaf302a3d89a9f4f4a165d991a96aa1a1 xen: avoid crash enabling turbo mode On a system which has not had P-state information pushed down into the hypervisor running "xenpm enable-turbo-mode" will reliably crash the host. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Committed-by: Jan Beulich <jbeulich@xxxxxxxx> xen-unstable changeset: 24144:cd3ef25f207a xen-unstable date: Tue Nov 15 14:24:38 2011 +0100 Committed-by: Keir Fraser <keir@xxxxxxx> --- diff -r 98ba0aceaf30 -r 4a91cf045893 xen/drivers/cpufreq/utility.c --- a/xen/drivers/cpufreq/utility.c Wed Nov 16 16:33:58 2011 +0000 +++ b/xen/drivers/cpufreq/utility.c Wed Nov 16 16:37:49 2011 +0000 @@ -400,7 +400,7 @@ struct cpufreq_policy *policy; policy = per_cpu(cpufreq_cpu_policy, cpuid); - if (policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) + if (policy && policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) policy->turbo = CPUFREQ_TURBO_ENABLED; } @@ -409,7 +409,7 @@ struct cpufreq_policy *policy; policy = per_cpu(cpufreq_cpu_policy, cpuid); - if (policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) + if (policy && policy->turbo != CPUFREQ_TURBO_UNSUPPORTED) policy->turbo = CPUFREQ_TURBO_DISABLED; } @@ -418,7 +418,7 @@ struct cpufreq_policy *policy; policy = per_cpu(cpufreq_cpu_policy, cpuid); - return policy->turbo; + return policy && policy->turbo; } /********************************************************************* _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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