From: Alexey Khoroshilov <khoroshilov@ispras.ru>
To: Peter Korsgaard <jacmet@sunsite.dk>, Wolfram Sang <wsa@the-dreams.de>
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
ldv-project@linuxtesting.org
Subject: [PATCH] i2c: ocores: add missed clk_disable_unprepare() on failure paths
Date: Thu, 4 Aug 2016 02:38:44 +0300 [thread overview]
Message-ID: <1470267524-14753-1-git-send-email-khoroshilov@ispras.ru> (raw)
clk_disable_unprepare() is missed on failure paths in ocores_i2c_probe().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
drivers/i2c/busses/i2c-ocores.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index dfa7a4b4a91d..ac88a524143e 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -379,6 +379,7 @@ static int ocores_i2c_of_probe(struct platform_device *pdev,
if (!clock_frequency_present) {
dev_err(&pdev->dev,
"Missing required parameter 'opencores,ip-clock-frequency'\n");
+ clk_disable_unprepare(i2c->clk);
return -ENODEV;
}
i2c->ip_clock_khz = clock_frequency / 1000;
@@ -467,20 +468,21 @@ static int ocores_i2c_probe(struct platform_device *pdev)
default:
dev_err(&pdev->dev, "Unsupported I/O width (%d)\n",
i2c->reg_io_width);
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_clk;
}
}
ret = ocores_init(&pdev->dev, i2c);
if (ret)
- return ret;
+ goto err_clk;
init_waitqueue_head(&i2c->wait);
ret = devm_request_irq(&pdev->dev, irq, ocores_isr, 0,
pdev->name, i2c);
if (ret) {
dev_err(&pdev->dev, "Cannot claim IRQ\n");
- return ret;
+ goto err_clk;
}
/* hook up driver to tree */
@@ -494,7 +496,7 @@ static int ocores_i2c_probe(struct platform_device *pdev)
ret = i2c_add_adapter(&i2c->adap);
if (ret) {
dev_err(&pdev->dev, "Failed to add adapter\n");
- return ret;
+ goto err_clk;
}
/* add in known devices to the bus */
@@ -504,6 +506,10 @@ static int ocores_i2c_probe(struct platform_device *pdev)
}
return 0;
+
+err_clk:
+ clk_disable_unprepare(i2c->clk);
+ return ret;
}
static int ocores_i2c_remove(struct platform_device *pdev)
--
1.9.1
next reply other threads:[~2016-08-03 23:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-03 23:38 Alexey Khoroshilov [this message]
2016-08-04 18:45 ` [PATCH] i2c: ocores: add missed clk_disable_unprepare() on failure paths Peter Korsgaard
2016-08-14 22:30 ` Wolfram Sang
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