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| author | Mark Rutland <mark.rutland@arm.com> | 2013-03-07 15:09:24 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 12:06:03 -0700 |
| commit | 611f2aaf1f4de0ab50d0a3dabfb1759d13f65cf9 (patch) | |
| tree | 7e10f94a06660127db03eb566682d23f4de8eca7 /net | |
| parent | 52bc8dc1e1023ad0a91b3c80d048688d4167b7e5 (diff) | |
| download | kernel_samsung_smdk4412-611f2aaf1f4de0ab50d0a3dabfb1759d13f65cf9.zip kernel_samsung_smdk4412-611f2aaf1f4de0ab50d0a3dabfb1759d13f65cf9.tar.gz kernel_samsung_smdk4412-611f2aaf1f4de0ab50d0a3dabfb1759d13f65cf9.tar.bz2 | |
clockevents: Don't allow dummy broadcast timers
commit a7dc19b8652c862d5b7c4d2339bd3c428bd29c4a upstream.
Currently tick_check_broadcast_device doesn't reject clock_event_devices
with CLOCK_EVT_FEAT_DUMMY, and may select them in preference to real
hardware if they have a higher rating value. In this situation, the
dummy timer is responsible for broadcasting to itself, and the core
clockevents code may attempt to call non-existent callbacks for
programming the dummy, eventually leading to a panic.
This patch makes tick_check_broadcast_device always reject dummy timers,
preventing this problem.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jon Medhurst (Tixy) <tixy@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions