Messages in this thread Patch in this message | | | From | Jiri Slaby <> | Subject | [PATCH 3.12 44/82] ipmi: fix timeout calculation when bmc is disconnected | Date | Mon, 24 Aug 2015 11:09:04 +0200 |
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From: Xie XiuQi <xiexiuqi@huawei.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit e21404dc0ac7ac971c1e36274b48bb460463f4e5 upstream.
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: Hu Shiyuan <hushiyuan@huawei.com> Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/char/ipmi/ipmi_si_intf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index e5bdd1a2f541..25ed69ffd8dd 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -2783,7 +2783,7 @@ static int wait_for_msg_done(struct smi_info *smi_info) smi_result == SI_SM_CALL_WITH_TICK_DELAY) { schedule_timeout_uninterruptible(1); smi_result = smi_info->handlers->event( - smi_info->si_sm, 100); + smi_info->si_sm, jiffies_to_usecs(1)); } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { smi_result = smi_info->handlers->event( smi_info->si_sm, 0); -- 2.5.0
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