Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1463377

[PATCH V3 0/2] rtc-cmos: Workaround unwanted interrupt generation

Show all headers | View raw

We have observed on few machines with rtc-cmos devices that it generates
an interrupt before the hpet_rtc_timer_init() call is finished. This leads
to hpet_rtc_interrupt() being called before it is fully initialized.

Therefore the while-loop of hpet_cnt_ahead() in hpet_rtc_timer_reinit()
never completes. This leads to "NMI watchdog: Watchdog detected hard LOCKUP
on cpu 0".

This patch set initializes hpet_default_delta and hpet_t1_cmp before
interrupt can be raised.

Changes since V2:
  - Improved commit log further
Changes since RFC:
  - Commit log of patches has been improved.

Pratyush Anand (2):
  rtc/hpet: Factorize hpet_rtc_timer_init()
  rtc/rtc-cmos: Initialize software counters before irq is registered

 arch/x86/include/asm/hpet.h |  2 ++
 arch/x86/kernel/hpet.c      | 41 +++++++++++++++++++++++++++++++++++------
 drivers/rtc/rtc-cmos.c      | 13 ++++++++++++-
 3 files changed, 49 insertions(+), 7 deletions(-)

-- 
2.5.5

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH V3 0/2] rtc-cmos: Workaround unwanted interrupt generation Pratyush Anand <panand@redhat.com> - 2016-08-16 05:30 +0200
  [PATCH V3 2/2] rtc/rtc-cmos: Initialize software counters before irq is registered Pratyush Anand <panand@redhat.com> - 2016-08-16 05:40 +0200
  [PATCH V3 1/2] rtc/hpet: Factorize hpet_rtc_timer_init() Pratyush Anand <panand@redhat.com> - 2016-08-16 05:40 +0200

csiph-web