linux-kernel - [PATCH 2/3] clk: lmk04832: Don't disable vco clock on probe fail

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Message-ID: <20230802064100.15793-2-mike.looijmans@topic.nl>
Date:   Wed, 2 Aug 2023 08:40:59 +0200
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     linux-clk@...r.kernel.org
CC:     linux-kernel@...r.kernel.org, sboyd@...nel.org,
        mturquette@...libre.com, Mike Looijmans <mike.looijmans@...ic.nl>
Subject: [PATCH 2/3] clk: lmk04832: Don't disable vco clock on probe fail

The probe() method never calls clk_prepare_enable(), so it should not
call clk_disable_unprepare() for the vco.clk in the error path. Fixes
a "lmk-vco already disabled" BUG when probe fails.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
---
 drivers/clk/clk-lmk04832.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/clk-lmk04832.c b/drivers/clk/clk-lmk04832.c
index 188085e7a30b..dd1f0c59ee71 100644
--- a/drivers/clk/clk-lmk04832.c
+++ b/drivers/clk/clk-lmk04832.c
@@ -1505,21 +1505,21 @@ static int lmk04832_probe(struct spi_device *spi)
 		ret = clk_set_rate(lmk->vco.clk, lmk->vco_rate);
 		if (ret) {
 			dev_err(lmk->dev, "failed to set VCO rate\n");
-			goto err_disable_vco;
+			goto err_disable_oscin;
 		}
 	}
 
 	ret = lmk04832_register_sclk(lmk);
 	if (ret) {
 		dev_err(lmk->dev, "failed to init SYNC/SYSREF clock path\n");
-		goto err_disable_vco;
+		goto err_disable_oscin;
 	}
 
 	for (i = 0; i < info->num_channels; i++) {
 		ret = lmk04832_register_clkout(lmk, i);
 		if (ret) {
 			dev_err(lmk->dev, "failed to register clk %d\n", i);
-			goto err_disable_vco;
+			goto err_disable_oscin;
 		}
 	}
 
@@ -1528,16 +1528,13 @@ static int lmk04832_probe(struct spi_device *spi)
 					  lmk->clk_data);
 	if (ret) {
 		dev_err(lmk->dev, "failed to add provider (%d)\n", ret);
-		goto err_disable_vco;
+		goto err_disable_oscin;
 	}
 
 	spi_set_drvdata(spi, lmk);
 
 	return 0;
 
-err_disable_vco:
-	clk_disable_unprepare(lmk->vco.clk);
-
 err_disable_oscin:
 	clk_disable_unprepare(lmk->oscin);
 
-- 
2.17.1


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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