linux-kernel - [PATCH 3.18 062/144] usb: host: ehci-tegra: request deferred probe when failing to get phy

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Message-Id: <20181108215059.360135270@linuxfoundation.org>
Date:   Thu,  8 Nov 2018 13:50:33 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vince Hsu <vinceh@...dia.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 3.18 062/144] usb: host: ehci-tegra: request deferred probe when failing to get phy

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit f56e67f0a880a5b795cdb5f62614aafe264c5304 ]

The commit 1290a958d48e ("usb: phy: propagate __of_usb_find_phy()'s error on
failure") changed the condition to return -EPROBE_DEFER to host driver.
Originally the Tegra host driver depended on the returned -EPROBE_DEFER to
get the phy device later when booting. Now we have to do that explicitly.

Signed-off-by: Vince Hsu <vinceh@...dia.com>
Tested-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/host/ehci-tegra.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index aad253559bcd..b4cc4c90b8e3 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -451,7 +451,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
 
 	u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0);
 	if (IS_ERR(u_phy)) {
-		err = PTR_ERR(u_phy);
+		err = -EPROBE_DEFER;
 		goto cleanup_clk_en;
 	}
 	hcd->usb_phy = u_phy;
-- 
2.17.1