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git.kernel.org/linux-stable/linux-3.2.y
linux-imx/drivers/char/ipmi
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Xie XiuQi 3e1f514133 ipmi: fix timeout calculation when bmc is disconnected 
commit e21404dc0a 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: Ben Hutchings <ben@decadent.org.uk>
Cc: sebastian.riemer@profitbricks.com
Cc: cminyard@mvista.com
Cc: openipmi-developer@lists.sourceforge.net
2016-06-15 21:28:10 +01:00
..
ipmi_bt_sm.c Char: ipmi_bt_sm, fix infinite loop 2014-04-30 16:23:27 +01:00
ipmi_devintf.c ipmi: ipmi_devintf: compat_ioctl method fails to take ipmi_mutex 2013-05-30 14:35:01 +01:00
ipmi_kcs_sm.c drivers/char/ipmi: Use KCS_IDLE_STATE 2009-12-16 07:20:10 -08:00
ipmi_msghandler.c ipmi: convert to seq_file interface 2011-05-26 17:12:37 -07:00
ipmi_poweroff.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ipmi_si_intf.c ipmi: fix timeout calculation when bmc is disconnected 2016-06-15 21:28:10 +01:00
ipmi_si_sm.h IPMI: Style fixes in the system interface code 2008-04-29 08:06:15 -07:00
ipmi_smic_sm.c IPMI: Style fixes in the system interface code 2008-04-29 08:06:15 -07:00
ipmi_watchdog.c ipmi_watchdog: restore settings when BMC reset 2011-12-20 10:25:04 -08:00
Kconfig Use menuconfig objects II - IPMI 2007-07-16 09:05:40 -07:00
Makefile drivers/char/ipmi/Makefile: replace the use of <module>-objs with <module>-y 2010-10-27 18:03:14 -07:00