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| author |   Joao Martins <joao.m.martins@oracle.com> | 2019-09-08 00:45:23 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-11 17:36:30 +0200 |
| commit | 5cc59f597c0666c6a7e1c67aac9063895949fd56 (patch) | |
| tree | d1acceb96df708a0935b4a8a33b52b843b41c1d5 /drivers/cpuidle | |
| parent | cpuidle-haltpoll: set haltpoll as preferred governor (diff) | |
| download | linux-dev-5cc59f597c0666c6a7e1c67aac9063895949fd56.tar.xz linux-dev-5cc59f597c0666c6a7e1c67aac9063895949fd56.zip | |
cpuidle-haltpoll: return -ENODEV on modinit failure
When a user loads cpuidle-haltpoll on a non KVM guest the module will
successfully load, even though idle driver registration didn't take
place.
We should instead return -ENODEV signaling the user that the driver can't
be loaded, like other error paths in haltpoll_init(). An example of such
error paths is when we return -EBUSY when attempting to register an idle
driver when it had one already (e.g. intel_idle loads at boot and then we
attempt to insert module cpuidle-haltpoll).
Fixes: fa86ee90eb11 ("add cpuidle-haltpoll driver")
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/cpuidle-haltpoll.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c index 519e90d125cf..7a0239ef717e 100644 --- a/drivers/cpuidle/cpuidle-haltpoll.c +++ b/drivers/cpuidle/cpuidle-haltpoll.c @@ -99,7 +99,7 @@ static int __init haltpoll_init(void) cpuidle_poll_state_init(drv); if (!kvm_para_available()) - return 0; + return -ENODEV; ret = cpuidle_register_driver(drv); if (ret < 0) |