Commit 57a90390 authored Dec 18, 2015 by Michael Neuling Committed by Michael Ellerman Dec 27, 2015

powerpc/powernv: Only delay opal_rtc_read() retry when necessary



Only delay opal_rtc_read() when busy and are going to retry.

This has the advantage of possibly saving a massive 10ms off booting!

Kudos to Stewart for noticing.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent affddff6

arch/powerpc/platforms/powernv/opal-rtc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -50,7 +50,7 @@ unsigned long __init opal_get_boot_time(void)
		rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms);
		if (rc == OPAL_BUSY_EVENT)
		opal_poll_events(NULL);
		else
		else if (rc == OPAL_BUSY)
		mdelay(10);
		}
		if (rc != OPAL_SUCCESS)