openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Gregory CLEMENT 2013-01-07 11:28:42 +01:00 committed by Russell King
parent 8b827c60a1
commit 8a3a180d21
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/arm/mm/cache-l2x0.c
View File

@ -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);
}
}