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usb: ulpi: Call of_node_put correctly

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commit 0a907ee9d95e3ac35eb023d71f29eae0aaa52d1b upstream.

of_node_put should always be called on device nodes gotten from
of_get_*. Additionally, it should only be called after there are no
remaining users. To address the first issue, call of_node_put if later
steps in ulpi_register fail. To address the latter, call put_device if
device_register fails, which will call ulpi_dev_release if necessary.

Fixes: ef6a7bcfb0 ("usb: ulpi: Support device discovery via DT")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Link: https://lore.kernel.org/r/20220127190004.1446909-3-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sean Anderson 2022-01-27 14:00:03 -05:00 committed by Greg Kroah-Hartman
parent 8b89a69166
commit 2a17bd9f52
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/common/ulpi.c
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@ -250,12 +250,16 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
return ret;
ret = ulpi_read_id(ulpi);
if (ret)
if (ret) {
of_node_put(ulpi->dev.of_node);
return ret;
}
ret = device_register(&ulpi->dev);
if (ret)
if (ret) {
put_device(&ulpi->dev);
return ret;
}
dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
ulpi->id.vendor, ulpi->id.product);