ARM: 7616/1: cache-l2x0: aurora: Use writel_relaxed instead of writel

The use of writel instead of writel_relaxed lead to deadlock in some
situation (SMP on Armada 370 for instance). The use of writel_relaxed
as it was done in the rest of this driver fixes this bug.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/cache-l2x0.c

@@ -460,8 +460,8 @@ static void aurora_pa_range(unsigned long start, unsigned long end,
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&l2x0_lock, flags);
-	writel(start, l2x0_base + AURORA_RANGE_BASE_ADDR_REG);
-	writel(end, l2x0_base + offset);
+	writel_relaxed(start, l2x0_base + AURORA_RANGE_BASE_ADDR_REG);
+	writel_relaxed(end, l2x0_base + offset);
 	raw_spin_unlock_irqrestore(&l2x0_lock, flags);
 
 	cache_sync();
@@ -675,8 +675,9 @@ static void pl310_resume(void)
 static void aurora_resume(void)
 {
 	if (!(readl(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) {
-		writel(l2x0_saved_regs.aux_ctrl, l2x0_base + L2X0_AUX_CTRL);
-		writel(l2x0_saved_regs.ctrl, l2x0_base + L2X0_CTRL);
+		writel_relaxed(l2x0_saved_regs.aux_ctrl,
+				l2x0_base + L2X0_AUX_CTRL);
+		writel_relaxed(l2x0_saved_regs.ctrl, l2x0_base + L2X0_CTRL);
 	}
 }