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    ipmi: fix timeout calculation when bmc is disconnected · e21404dc
    Xie XiuQi 提交于
    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) instead of 100
    usecs from timeout.
    Reported-by: NHu Shiyuan <hushiyuan@huawei.com>
    Signed-off-by: NXie XiuQi <xiexiuqi@huawei.com>
    Signed-off-by: NCorey Minyard <cminyard@mvista.com>
    Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
    e21404dc
ipmi_si_intf.c 91.8 KB