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i2c: arb-gpio-challenge: use of_get_i2c_adapter_by_node interface 

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.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Vladimir Zapolskiy 2015-07-27 17:30:51 +03:00 committed by Wolfram Sang
parent 48e9743dd6
commit 0d1ad98dd8
1 changed files with 1 additions and 1 deletions
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2
drivers/i2c/muxes/i2c-arb-gpio-challenge.c
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@ -196,7 +196,7 @@ 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);
if (!arb->parent) {
dev_err(dev, "Cannot find parent bus\n");
return -EPROBE_DEFER;