| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 012/128] bus: sunxi-rsb: Fix shutdown | Date | Mon, 27 Dec 2021 16:29:47 +0100 |
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From: Jernej Skrabec <jernej.skrabec@gmail.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@gmail.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Link: https://lore.kernel.org/r/20211121083537.612473-1-jernej.skrabec@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.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
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