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