linux-kernel - [PATCH 8/9] usb: host: xhci-plat: allow upper layers to signal power loss

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250129105613.403923-8-theo.lebrun@bootlin.com>
Date: Wed, 29 Jan 2025 11:56:12 +0100
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: theo.lebrun@...tlin.com,
	mathias.nyman@...ux.intel.com
Cc: rogerq@...nel.org,
	peter.chen@...nel.org,
	pawell@...ence.com,
	gregkh@...uxfoundation.org,
	mathias.nyman@...el.com,
	gregory.clement@...tlin.com,
	thomas.petazzoni@...tlin.com,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 8/9] usb: host: xhci-plat: allow upper layers to signal power loss

Now that xhci_resume() exposes a power_lost boolean argument, expose
that to all xhci-plat implementations. They are free to set it from
wherever they want:
 - Their own resume() callback.
 - The xhci_plat_priv::resume_quirk() callback.

Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
---
 drivers/usb/host/xhci-plat.c | 3 ++-
 drivers/usb/host/xhci-plat.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 831af518a6ec..8b18494ccc41 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -479,6 +479,7 @@ static int xhci_plat_suspend(struct device *dev)
 static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
+	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	int ret;
 
@@ -498,7 +499,7 @@ static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 	if (ret)
 		goto disable_clks;
 
-	ret = xhci_resume(xhci, power_lost, false);
+	ret = xhci_resume(xhci, power_lost || priv->power_lost, false);
 	if (ret)
 		goto disable_clks;
 
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 6475130eac4b..fe4f95e690fa 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -15,6 +15,7 @@ struct usb_hcd;
 struct xhci_plat_priv {
 	const char *firmware_name;
 	unsigned long long quirks;
+	bool power_lost;
 	void (*plat_start)(struct usb_hcd *);
 	int (*init_quirk)(struct usb_hcd *);
 	int (*suspend_quirk)(struct usb_hcd *);
-- 
2.48.1