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44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
From d965b0fca7dcde3f82c982e0bf1631069fdeb8c9 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@arm.linux.org.uk>
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Date: Fri, 15 May 2015 11:56:45 +0100
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Subject: [PATCH 70/74] ARM: l2c: restore the behaviour documented above
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l2c_enable()
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l2c_enable() is documented that it must not be called if the cache has
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already been enabled. Unfortunately, commit 6b49241ac252 ("ARM: 8259/1:
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l2c: Refactor the driver to use commit-like interface") changed this
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without updating the comment, for very little reason. Revert this
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change and restore the expected behaviour.
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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---
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arch/arm/mm/cache-l2x0.c | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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--- a/arch/arm/mm/cache-l2x0.c
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+++ b/arch/arm/mm/cache-l2x0.c
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@@ -129,10 +129,6 @@ static void l2c_enable(void __iomem *bas
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{
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unsigned long flags;
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- /* Do not touch the controller if already enabled. */
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- if (readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN)
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- return;
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-
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l2x0_saved_regs.aux_ctrl = aux;
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l2c_configure(base);
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@@ -163,7 +159,11 @@ static void l2c_save(void __iomem *base)
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static void l2c_resume(void)
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{
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- l2c_enable(l2x0_base, l2x0_saved_regs.aux_ctrl, l2x0_data->num_lock);
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+ void __iomem *base = l2x0_base;
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+
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+ /* Do not touch the controller if already enabled. */
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+ if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN))
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+ l2c_enable(base, l2x0_saved_regs.aux_ctrl, l2x0_data->num_lock);
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}
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/*
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