The patch below does not apply to the 5.16-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b470947c3672f7eb7c4c271d510383d896831cc2 Mon Sep 17 00:00:00 2001 From: Robert Hancock robert.hancock@calian.com Date: Thu, 27 Jan 2022 16:15:00 -0600 Subject: [PATCH] usb: dwc3: xilinx: fix uninitialized return value

A previous patch to skip part of the initialization when a USB3 PHY was not present could result in the return value being uninitialized in that case, causing spurious probe failures. Initialize ret to 0 to avoid this.

Fixes: 9678f3361afc ("usb: dwc3: xilinx: Skip resets and USB3 register settings for USB2.0 mode") Cc: stable@vger.kernel.org Reviewed-by: Nathan Chancellor nathan@kernel.org Signed-off-by: Robert Hancock robert.hancock@calian.com Link: https://lore.kernel.org/r/20220127221500.177021-1-robert.hancock@calian.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c index e14ac15e24c3..a6f3a9b38789 100644 --- a/drivers/usb/dwc3/dwc3-xilinx.c +++ b/drivers/usb/dwc3/dwc3-xilinx.c @@ -99,7 +99,7 @@ static int dwc3_xlnx_init_zynqmp(struct dwc3_xlnx *priv_data) struct device *dev = priv_data->dev; struct reset_control *crst, *hibrst, *apbrst; struct phy *usb3_phy; - int ret; + int ret = 0; u32 reg;

usb3_phy = devm_phy_optional_get(dev, "usb3-phy");