From 9d4876f039a086eeb599a8fac684c9a8daa64ab1 Mon Sep 17 00:00:00 2001 From: Yilu Mao Date: Mon, 3 Sep 2012 09:14:56 +0100 Subject: [PATCH] ARM: 7507/1: cache-l2x0.c: save the final aux ctrl value for resuming There is a bug if l2x0 controller has been enabled when calling l2x0_init, the aux ctrl register will not be saved in l2x0_saved_regs. Therefore we will use uninitialized l2x0_saved_regs.aux_ctrl for resuming later. In this patch, the aux ctrl value is read and saved after it is initialized. So we have the real value being set for resuming. Link: http://lkml.kernel.org/r/1336046857-24133-1-git-send-email-ylmao@marvell.com Signed-off-by: Yilu Mao Acked-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/mm/cache-l2x0.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 2a8e380..97ec256 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -368,14 +368,18 @@ void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) /* l2x0 controller is disabled */ writel_relaxed(aux, l2x0_base + L2X0_AUX_CTRL); - l2x0_saved_regs.aux_ctrl = aux; - l2x0_inv_all(); /* enable L2X0 */ writel_relaxed(1, l2x0_base + L2X0_CTRL); } + /* Re-read it in case some bits are reserved. */ + aux = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); + + /* Save the value for resuming. */ + l2x0_saved_regs.aux_ctrl = aux; + outer_cache.inv_range = l2x0_inv_range; outer_cache.clean_range = l2x0_clean_range; outer_cache.flush_range = l2x0_flush_range; -- 2.7.4