linux-kernel - [PATCH] clk: not calculate new rate for protected clks

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Message-Id: <20210531103957.21886-1-peng.fan@oss.nxp.com>
Date:   Mon, 31 May 2021 18:39:57 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     sboyd@...nel.org, mturquette@...libre.com
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de,
        Peng Fan <peng.fan@....com>
Subject: [PATCH] clk: not calculate new rate for protected clks

From: Peng Fan <peng.fan@....com>

If the protect_count of the parent clk is not 0, we not calculate new
rates for parent. Otherwise, the common clk framework may configure
other child clks that is under using.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/clk/clk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 65508eb89ec9..8ac121838e13 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2002,7 +2002,7 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core,
 	}
 
 	if ((core->flags & CLK_SET_RATE_PARENT) && parent &&
-	    best_parent_rate != parent->rate)
+	    best_parent_rate != parent->rate && !clk_core_rate_is_protected(parent))
 		top = clk_calc_new_rates(parent, best_parent_rate);
 
 out:
-- 
2.30.0