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authorCorey Minyard <cminyard@mvista.com>2014-04-14 09:46:53 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-17 12:23:07 -0700
commit0dfe6e7ed47feeb22f3cf8c7d8ac7e65bd4e87f5 (patch)
tree251baf30cfce1f195e4d472931b8dacd03786c74 /drivers/char
parenteb6d78ec213e6938559b801421d64714dafcf4b2 (diff)
downloadlinux-0dfe6e7ed47feeb22f3cf8c7d8ac7e65bd4e87f5.tar.bz2
ipmi: Turn off default probing of interfaces
The default probing can cause problems with some system, slow booting, extra CPU usages, etc. Turn it off by default and give a config option to enable it. From: Matthew Garrett <matthew.garrett@nebula.com> Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/ipmi/Kconfig12
-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c2
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index 0baa8fab4ea7..db1c9b7adaa6 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -50,6 +50,18 @@ config IPMI_SI
Currently, only KCS and SMIC are supported. If
you are using IPMI, you should probably say "y" here.
+config IPMI_SI_PROBE_DEFAULTS
+ bool 'Probe for all possible IPMI system interfaces by default'
+ default n
+ depends on IPMI_SI
+ help
+ Modern systems will usually expose IPMI interfaces via a discoverable
+ firmware mechanism such as ACPI or DMI. Older systems do not, and so
+ the driver is forced to probe hardware manually. This may cause boot
+ delays. Say "n" here to disable this manual probing. IPMI will then
+ only be available on older systems if the "ipmi_si_intf.trydefaults=1"
+ boot argument is passed.
+
config IPMI_WATCHDOG
tristate 'IPMI Watchdog Timer'
help
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 9c4069151955..25a1436a4291 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1239,7 +1239,7 @@ static bool si_tryplatform = 1;
#ifdef CONFIG_PCI
static bool si_trypci = 1;
#endif
-static bool si_trydefaults = 1;
+static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
static char *si_type[SI_MAX_PARMS];
#define MAX_SI_TYPE_STR 30
static char si_type_str[MAX_SI_TYPE_STR];