patch "usb: ulpi: Call of_node_put correctly" added to usb-linus

patch "usb: ulpi: Call of_node_put correctly" added to usb-linus

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: ulpi: Call of_node_put correctly

to my usb git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


From 0a907ee9d95e3ac35eb023d71f29eae0aaa52d1b Mon Sep 17 00:00:00 2001
From: Sean Anderson <sean.anderson@seco.com>
Date: Thu, 27 Jan 2022 14:00:03 -0500
Subject: usb: ulpi: Call of_node_put correctly

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(-)

diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 09ad569a1a35..5509d3847af4 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -248,12 +248,16 @@ 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);
-- 
2.35.1