Messages in this thread | | | Date | Fri, 13 Dec 2013 10:36:36 +0800 | From | Xie XiuQi <> | Subject | [PATCH 0/2] ipmi: fix timeout calculation when bmc is disconnected |
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Hu Shiyuan report, when loading ipmi_si module while bmc is disconnected, we found the timeout is longer than 5 secs. Actually it takes about 3 mins and 20 secs (HZ=250).
error message as below: Dec 12 19:08:59 linux kernel: IPMI BT: timeout in RD_WAIT [ ] 1 retries left Dec 12 19:08:59 linux kernel: BT: write 4 bytes seq=0x01 03 18 00 01 [...] Dec 12 19:12:19 linux kernel: IPMI BT: timeout in RD_WAIT [ ] Dec 12 19:12:19 linux kernel: failed 2 retries, sending error response Dec 12 19:12:19 linux kernel: IPMI: BT reset (takes 5 secs) Dec 12 19:12:19 linux kernel: IPMI BT: flag reset [ ]
Function wait_for_msg_done() use schedule_timeout_uninterruptible(1) to sleep 1 tick, so we should subtract jiffies_to_usecs(1) usecs instead of 100 usecs from timeout.
For more clearly, I used USEC_PER_SEC instead of 1000000.
Xie XiuQi (2): ipmi: use USEC_PER_SEC instead of 1000000 for more meaningful ipmi: fix timeout calculation when bmc is disconnected
drivers/char/ipmi/ipmi_bt_sm.c | 8 ++++---- drivers/char/ipmi/ipmi_kcs_sm.c | 4 ++-- drivers/char/ipmi/ipmi_si_intf.c | 2 +- drivers/char/ipmi/ipmi_smic_sm.c | 2 +- 4 files changed, 8 insertions(+), 8 deletions(-)
-- 1.8.2.2
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