| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 33/44] usb: ulpi: Call of_node_put correctly | Date | Mon, 14 Feb 2022 10:25:56 +0100 |
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From: Sean Anderson <sean.anderson@seco.com>
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: ef6a7bcfb01c ("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> --- drivers/usb/common/ulpi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/usb/common/ulpi.c +++ b/drivers/usb/common/ulpi.c @@ -252,12 +252,16 @@ static int ulpi_register(struct device * 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);
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