[PATCH] ppc32: Fix might_sleep() warning with clock spreading

The clock spreading disable/enable code was called to late/early during
the suspend/resume code on some laptops and would trigger a
might_sleep() warning due to the down() call in the low level i2c code.

This fixes it by calling those functions earlier/later when interrupts
are still enabled.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/macintosh/via-pmu.c

@@ -2351,6 +2351,10 @@ pmac_suspend_devices(void)
 		return -EBUSY;
 	}
 
+	/* Disable clock spreading on some machines */
+	pmac_tweak_clock_spreading(0);
+
+	/* Stop preemption */
 	preempt_disable();
 
 	/* Make sure the decrementer won't interrupt us */
@@ -2417,11 +2421,12 @@ pmac_wakeup_devices(void)
 
 	/* Re-enable local CPU interrupts */
 	local_irq_enable();
-
 	mdelay(100);
-
 	preempt_enable();
 
+	/* Re-enable clock spreading on some machines */
+	pmac_tweak_clock_spreading(1);
+
 	/* Resume devices */
 	device_resume();