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 <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -490,6 +490,12 @@ static int __init rtas_init(void)
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return -ENODEV;
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}
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if (!rtas_event_scan_rate) {
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/* Broken firmware: take a rate of zero to mean don't scan */
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printk(KERN_DEBUG "rtasd: scan rate is 0, not scanning\n");
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return 0;
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}
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/* Make room for the sequence number */
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rtas_error_log_max = rtas_get_error_log_max();
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rtas_error_log_buffer_max = rtas_error_log_max + sizeof(int);
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