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ipmi: Turn off default probing of interfaces

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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>
This commit is contained in:
Corey Minyard
2014-04-14 09:46:53 -05:00
committed by Linus Torvalds
parent eb6d78ec21
commit 0dfe6e7ed4
2 changed files with 13 additions and 1 deletions
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12
drivers/char/ipmi/Kconfig
View File

@@ -50,6 +50,18 @@ config IPMI_SI
Currently, only KCS and SMIC are supported. If Currently, only KCS and SMIC are supported. If
you are using IPMI, you should probably say "y" here. 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 config IPMI_WATCHDOG
tristate 'IPMI Watchdog Timer' tristate 'IPMI Watchdog Timer'
help help

2
drivers/char/ipmi/ipmi_si_intf.c
View File

@@ -1239,7 +1239,7 @@ static bool si_tryplatform = 1;
#ifdef CONFIG_PCI #ifdef CONFIG_PCI
static bool si_trypci = 1; static bool si_trypci = 1;
#endif #endif
static bool si_trydefaults = 1; static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
static char *si_type[SI_MAX_PARMS]; static char *si_type[SI_MAX_PARMS];
#define MAX_SI_TYPE_STR 30 #define MAX_SI_TYPE_STR 30
static char si_type_str[MAX_SI_TYPE_STR]; static char si_type_str[MAX_SI_TYPE_STR];