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Subject[PATCH 4.9 050/310] i2c: mux: reg: put away the parent i2c adapter on probe failure
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Rosin <peda@axentia.se>


[ Upstream commit 68118e0e73aa3a6291c8b9eb1ee708e05f110cea ]

It is only prudent to let go of resources that are not used.

Fixes: b3fdd32799d8 ("i2c: mux: Add register-based mux i2c-mux-reg")
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/i2c/muxes/i2c-mux-reg.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

--- a/drivers/i2c/muxes/i2c-mux-reg.c
+++ b/drivers/i2c/muxes/i2c-mux-reg.c
@@ -196,20 +196,25 @@ static int i2c_mux_reg_probe(struct plat
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mux->data.reg_size = resource_size(res);
mux->data.reg = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mux->data.reg))
- return PTR_ERR(mux->data.reg);
+ if (IS_ERR(mux->data.reg)) {
+ ret = PTR_ERR(mux->data.reg);
+ goto err_put_parent;
+ }
}

if (mux->data.reg_size != 4 && mux->data.reg_size != 2 &&
mux->data.reg_size != 1) {
dev_err(&pdev->dev, "Invalid register size\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_put_parent;
}

muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values, 0, 0,
i2c_mux_reg_select, NULL);
- if (!muxc)
- return -ENOMEM;
+ if (!muxc) {
+ ret = -ENOMEM;
+ goto err_put_parent;
+ }
muxc->priv = mux;

platform_set_drvdata(pdev, muxc);
@@ -235,6 +240,8 @@ static int i2c_mux_reg_probe(struct plat

add_adapter_failed:
i2c_mux_del_adapters(muxc);
+err_put_parent:
+ i2c_put_adapter(parent);

return ret;
}

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