This change is needed to properly lock I2C parent bus driver.
Prior to this change i2c_put_adapter() is misused, which may lead
to an overflow over zero of I2C bus driver user counter.
By the way added a missing of_node_put() to eliminate memory leak,
if OF_DYNAMIC is enabled.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@xxxxxxxxxx>
Cc: Doug Anderson <dianders@xxxxxxxxxxxx>
---
Changes from v1 to v2:
* none, the same change as v1 10/10
drivers/i2c/muxes/i2c-arb-gpio-challenge.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/muxes/i2c-arb-gpio-challenge.c b/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
index 5cf1b60..402e3a6 100644
--- a/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
+++ b/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
@@ -196,7 +196,8 @@ static int i2c_arbitrator_probe(struct platform_device *pdev)
dev_err(dev, "Cannot parse i2c-parent\n");
return -EINVAL;
}
- arb->parent = of_find_i2c_adapter_by_node(parent_np);
+ arb->parent = of_get_i2c_adapter_by_node(parent_np);
+ of_node_put(parent_np);
if (!arb->parent) {
dev_err(dev, "Cannot find parent bus\n");
return -EPROBE_DEFER;
--
2.1.4
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