From: Michael Ellerman Date: Wed, 19 May 2010 02:12:32 +0000 (+0000) Subject: powerpc/rtasd: Don't start event scan if scan rate is zero X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7358650e9e9a81c854dc4582b4193eb5ea500bf6;p=deliverable%2Flinux.git powerpc/rtasd: Don't start event scan if scan rate is zero There appear to be Pegasos systems which have the rtas-event-scan RTAS tokens, but on which the event scan always fails. They also have an event-scan-rate property containing 0, which means call event scan 0 times per minute. So interpret a scan rate of 0 to mean don't scan at all. This fixes the problem on the Pegasos machines and makes sense as well. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c index e907ca66f75a..638883e23e3a 100644 --- a/arch/powerpc/kernel/rtasd.c +++ b/arch/powerpc/kernel/rtasd.c @@ -490,6 +490,12 @@ static int __init rtas_init(void) return -ENODEV; } + if (!rtas_event_scan_rate) { + /* Broken firmware: take a rate of zero to mean don't scan */ + printk(KERN_DEBUG "rtasd: scan rate is 0, not scanning\n"); + return 0; + } + /* Make room for the sequence number */ rtas_error_log_max = rtas_get_error_log_max(); rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int);