[PATCH 5.17 594/772] i2c: rcar: fix PM ref counts in probe error paths

Greg Kroah-Hartman
2022-06-07T21:31:58Z

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

[ Upstream commit 3fe2ec59db1a7569e18594b9c0cf1f4f1afd498e ]

We have to take care of ID_P_PM_BLOCKED when bailing out during probe.

Fixes: 7ee24eb508d6 ("i2c: rcar: disable PM in multi-master mode")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/i2c/busses/i2c-rcar.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index f71c730f9838..995ecf5e4438 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -1062,8 +1062,10 @@ static int rcar_i2c_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
ret = rcar_i2c_clock_calculate(priv);
- if (ret < 0)
- goto out_pm_put;
+ if (ret < 0) {
+ pm_runtime_put(dev);
+ goto out_pm_disable;
+ }

rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */

@@ -1092,19 +1094,19 @@ static int rcar_i2c_probe(struct platform_device *pdev)

ret = platform_get_irq(pdev, 0);
if (ret < 0)
- goto out_pm_disable;
+ goto out_pm_put;
priv->irq = ret;
ret = devm_request_irq(dev, priv->irq, irqhandler, irqflags, dev_name(dev), priv);
if (ret < 0) {
dev_err(dev, "cannot get irq %d\n", priv->irq);
- goto out_pm_disable;
+ goto out_pm_put;
}

platform_set_drvdata(pdev, priv);

ret = i2c_add_numbered_adapter(adap);
if (ret < 0)
- goto out_pm_disable;
+ goto out_pm_put;

if (priv->flags & ID_P_HOST_NOTIFY) {
priv->host_notify_client = i2c_new_slave_host_notify_device(adap);
@@ -1121,7 +1123,8 @@ static int rcar_i2c_probe(struct platform_device *pdev)
out_del_device:
i2c_del_adapter(&priv->adap);
out_pm_put:
- pm_runtime_put(dev);
+ if (priv->flags & ID_P_PM_BLOCKED)
+ pm_runtime_put(dev);
out_pm_disable:
pm_runtime_disable(dev);
return ret;
--
2.35.1