linux-kernel - [PATCH v2 02/18] clk: at91: clk-generated: check best

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Date:   Wed, 22 Jul 2020 10:38:10 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <ludovic.desroches@...rochip.com>
CC:     <bbrezillon@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        "Claudiu Beznea" <claudiu.beznea@...rochip.com>
Subject: [PATCH v2 02/18] clk: at91: clk-generated: check best_rate against ranges

Check best_rate against available clock ranges.

Fixes: df70aeef6083 ("clk: at91: add generated clock driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/clk/at91/clk-generated.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index 995a13133cfb..f8e557e0e1b8 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -185,8 +185,8 @@ static int clk_generated_determine_rate(struct clk_hw *hw,
 		 __clk_get_name((req->best_parent_hw)->clk),
 		 req->best_parent_rate);
 
-	if (best_rate < 0)
-		return best_rate;
+	if (best_rate < 0 || (gck->range.max && best_rate > gck->range.max))
+		return -EINVAL;
 
 	req->rate = best_rate;
 	return 0;
-- 
2.7.4