netdev - [PATCH 4/5] USB: serial: qcserial: disable autosuspend for QDL configurations

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Message-ID: <20241117083204.57738-4-intelfx@intelfx.name>
Date: Sun, 17 Nov 2024 12:31:14 +0400
From: Ivan Shapovalov <intelfx@...elfx.name>
To: linux-kernel@...r.kernel.org
Cc: Ivan Shapovalov <intelfx@...elfx.name>,
	Bjørn Mork <bjorn@...k.no>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Johan Hovold <johan@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	netdev@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: [PATCH 4/5] USB: serial: qcserial: disable autosuspend for QDL configurations

This is a port of the corresponding change from the qcserial.c driver
distributed as part of the 9X50 SDK, tested using author's own EM7565
device.

Signed-off-by: Ivan Shapovalov <intelfx@...elfx.name>
---
 drivers/usb/serial/qcserial.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index f1b0ef9935bb..b2ae0b16bc2b 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -257,6 +257,7 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 {
 	struct usb_host_interface *intf = serial->interface->cur_altsetting;
 	struct device *dev = &serial->dev->dev;
+	struct usb_device *usb_dev = serial->dev;
 	int retval = -ENODEV;
 	__u8 nintf;
 	__u8 ifnum;
@@ -289,6 +290,9 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 				retval = 0; /* Success */
 			else
 				altsetting = 1;
+
+			/* disable USB SS for QDL */
+			usb_disable_autosuspend(usb_dev);
 		}
 		goto done;
 
-- 
2.47.0.5.gd823fa0eac