linux-kernel - [PATCH] usb: cdns3: host: Add null check for host

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Message-ID: <20260119082242.1922599-1-a-kumar2@ti.com>
Date: Mon, 19 Jan 2026 13:52:42 +0530
From: Abhash Kumar Jha <a-kumar2@...com>
To: <gregkh@...uxfoundation.org>, <pawell@...ence.com>,
	<peter.chen@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>, <rogerq@...nel.org>, <u-kumar1@...com>,
	<p-mantena@...com>, <theo.lebrun@...tlin.com>
Subject: [PATCH] usb: cdns3: host: Add null check for host_device before accessing its members

In cases when the xhci device is not populated, we see a nullptr
exception when resuming.

Add a nullptr check for the host_dev before accessing its private data.

Fixes: 3a85c1011540 ("usb: host: cdns3: forward lost power information to xhci")
Signed-off-by: Abhash Kumar Jha <a-kumar2@...com>
---
 drivers/usb/cdns3/host.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
index f0df114c2b53b..8cc7fc1de6193 100644
--- a/drivers/usb/cdns3/host.c
+++ b/drivers/usb/cdns3/host.c
@@ -141,9 +141,12 @@ static void cdns_host_exit(struct cdns *cdns)
 static int cdns_host_resume(struct cdns *cdns, bool power_lost)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(cdns->host_dev);
-	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+	struct xhci_plat_priv *priv;
 
-	priv->power_lost = power_lost;
+	if (hcd) {
+		priv = hcd_to_xhci_priv(hcd);
+		priv->power_lost = power_lost;
+	}
 
 	return 0;
 }
-- 
2.34.1