[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20211227151331.913344418@linuxfoundation.org>
Date: Mon, 27 Dec 2021 16:29:47 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jernej Skrabec <jernej.skrabec@...il.com>,
Maxime Ripard <maxime@...no.tech>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 012/128] bus: sunxi-rsb: Fix shutdown
From: Jernej Skrabec <jernej.skrabec@...il.com>
[ Upstream commit 017a716e7b0e9d4ac06a4d7779bd04fca009bbc9 ]
Function sunxi_rsb_hw_exit() is sometimes called with pm runtime
disabled, so in such cases pm_runtime_resume() will fail with -EACCES.
Instead of doing whole dance of enabling pm runtime and thus clock just
to disable it again immediately, just check if disabling clock is
needed. That way calling pm_runtime_resume() is not needed at all.
Fixes: 4a0dbc12e618 ("bus: sunxi-rsb: Implement runtime power management")
Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
Link: https://lore.kernel.org/r/20211121083537.612473-1-jernej.skrabec@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/bus/sunxi-rsb.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
index 6f225dddc74f4..4566e730ef2b8 100644
--- a/drivers/bus/sunxi-rsb.c
+++ b/drivers/bus/sunxi-rsb.c
@@ -687,11 +687,11 @@ err_clk_disable:
static void sunxi_rsb_hw_exit(struct sunxi_rsb *rsb)
{
- /* Keep the clock and PM reference counts consistent. */
- if (pm_runtime_status_suspended(rsb->dev))
- pm_runtime_resume(rsb->dev);
reset_control_assert(rsb->rstc);
- clk_disable_unprepare(rsb->clk);
+
+ /* Keep the clock and PM reference counts consistent. */
+ if (!pm_runtime_status_suspended(rsb->dev))
+ clk_disable_unprepare(rsb->clk);
}
static int __maybe_unused sunxi_rsb_runtime_suspend(struct device *dev)
--
2.34.1
Powered by blists - more mailing lists