Commit-ID: b78f3f3c898c824bf56ab55cfa59fc72be49c349 Gitweb: http://git.kernel.org/tip/b78f3f3c898c824bf56ab55cfa59fc72be49c349 Author: Thomas Gleixner <[email protected]> AuthorDate: Tue, 7 Jul 2015 16:34:32 +0200 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 7 Jul 2015 18:46:47 +0200
tick/broadcast: Prevent deep idle if no broadcast device available Add a check for a installed broadcast device to the oneshot control function and return busy if not. [ Split out from a larger combo patch ] Reported-and-tested-by: Sudeep Holla <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Suzuki Poulose <[email protected]> Cc: Lorenzo Pieralisi <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Rafael J. Wysocki <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Preeti U Murthy <[email protected]> Cc: Ingo Molnar <[email protected]> Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1507070929360.3916@nanos --- kernel/time/tick-broadcast.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index ef77b16..fad3f78 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -693,6 +693,13 @@ int __tick_broadcast_oneshot_control(enum tick_broadcast_state state) ktime_t now; /* + * If there is no broadcast device, tell the caller not to go + * into deep idle. + */ + if (!tick_broadcast_device.evtdev) + return -EBUSY; + + /* * Periodic mode does not care about the enter/exit of power * states */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
