From 6b493f6079a430fd41f66933b68d1bb1ad37ca8c Mon Sep 17 00:00:00 2001 From: Oliver O'Halloran Date: Fri, 15 Feb 2019 11:48:16 +1100 Subject: powerpc/eeh: Allow disabling recovery Currently when we detect an error we automatically invoke the EEH recovery handler. This can be annoying when debugging EEH problems, or when working on EEH itself so this patch adds a debugfs knob that will prevent a recovery event from being queued up when an issue is detected. Signed-off-by: Oliver O'Halloran Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/eeh.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/powerpc/kernel/eeh.c') diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index 8d36c50e906f..0996f22b2612 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -111,6 +111,13 @@ EXPORT_SYMBOL(eeh_subsystem_flags); */ u32 eeh_max_freezes = 5; +/* + * Controls whether a recovery event should be scheduled when an + * isolated device is discovered. This is only really useful for + * debugging problems with the EEH core. + */ +bool eeh_debugfs_no_recover; + /* Platform dependent EEH operations */ struct eeh_ops *eeh_ops = NULL; @@ -1843,6 +1850,9 @@ static int __init eeh_init_proc(void) &eeh_enable_dbgfs_ops); debugfs_create_u32("eeh_max_freezes", 0600, powerpc_debugfs_root, &eeh_max_freezes); + debugfs_create_bool("eeh_disable_recovery", 0600, + powerpc_debugfs_root, + &eeh_debugfs_no_recover); eeh_cache_debugfs_init(); #endif } -- cgit v1.2.3