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From: Robert Hancock <robert.hancock@calian.com>
To: linux-usb@vger.kernel.org
Cc: Thinh.Nguyen@synopsys.com, robh+dt@kernel.org,
	devicetree@vger.kernel.org, michal.simek@xilinx.com,
	balbi@kernel.org, gregkh@linuxfoundation.org,
	mounika.grace.akula@xilinx.com, manish.narani@xilinx.com,
	Robert Hancock <robert.hancock@calian.com>
Subject: [PATCH v4 2/5] usb: dwc3: xilinx: Fix error handling when getting USB3 PHY
Date: Thu, 13 Jan 2022 22:42:27 -0600	[thread overview]
Message-ID: <20220114044230.2677283-3-robert.hancock@calian.com> (raw)
In-Reply-To: <20220114044230.2677283-1-robert.hancock@calian.com>

The code that looked up the USB3 PHY was ignoring all errors other than
EPROBE_DEFER in an attempt to handle the PHY not being present. Fix and
simplify the code by using devm_phy_optional_get and dev_err_probe so
that a missing PHY is not treated as an error and unexpected errors
are handled properly.

Fixes: 84770f028fab ("usb: dwc3: Add driver for Xilinx platforms")
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
---
 drivers/usb/dwc3/dwc3-xilinx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c
index 3bc035376394..3b16e7610009 100644
--- a/drivers/usb/dwc3/dwc3-xilinx.c
+++ b/drivers/usb/dwc3/dwc3-xilinx.c
@@ -102,12 +102,12 @@ static int dwc3_xlnx_init_zynqmp(struct dwc3_xlnx *priv_data)
 	int			ret;
 	u32			reg;
 
-	usb3_phy = devm_phy_get(dev, "usb3-phy");
-	if (PTR_ERR(usb3_phy) == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
+	usb3_phy = devm_phy_optional_get(dev, "usb3-phy");
+	if (IS_ERR(usb3_phy)) {
+		ret = PTR_ERR(usb3_phy);
+		dev_err_probe(dev, ret,
+			      "failed to get USB3 PHY\n");
 		goto err;
-	} else if (IS_ERR(usb3_phy)) {
-		usb3_phy = NULL;
 	}
 
 	crst = devm_reset_control_get_exclusive(dev, "usb_crst");
-- 
2.31.1


  parent reply	other threads:[~2022-01-14  4:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-14  4:42 [PATCH v4 0/5] Xilinx ZynqMP USB fixes Robert Hancock
2022-01-14  4:42 ` [PATCH v4 1/5] usb: dwc3: xilinx: Fix PIPE clock selection for USB2.0 mode Robert Hancock
2022-01-14  4:42 ` Robert Hancock [this message]
2022-01-14  4:42 ` [PATCH v4 3/5] dt-bindings: usb: dwc3: add reference clock period fractional adjustment Robert Hancock
2022-01-14  4:42 ` [PATCH v4 4/5] usb: dwc3: add reference clock FLADJ configuration Robert Hancock
2022-01-14 18:05   ` Sean Anderson
2022-01-14 19:22     ` Robert Hancock
2022-01-14 19:56       ` Sean Anderson
2022-01-14  4:42 ` [PATCH v4 5/5] arm64: dts: zynqmp: Add DWC3 USB reference clock period configuration Robert Hancock

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