--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/5.12/0001-USB-serial-ftdi_sio-pass-port-to-quirk-port_probe-fu.patch	Mon Dec 11 06:29:33 2023 +0000
@@ -0,0 +1,85 @@
+From 28e1cea403f1db216acfe0a8bb38840429655eaa Mon Sep 17 00:00:00 2001
+From: "Mychaela N. Falconia" <falcon@freecalypso.org>
+Date: Fri, 2 Oct 2020 17:38:56 +0000
+Subject: [PATCH 1/2] USB: serial: ftdi_sio: pass port to quirk port_probe
+ functions
+
+The original code passed only the pointer to the ftdi_private struct
+to quirk port_probe functions.  However, some quirks may need to be
+applied conditionally only to some channels of a multichannel FT2232x
+or FT4232H device, and if a given quirk's port_probe function needs
+to figure out which channel of a multichannel device is currently
+being considered, it needs access to the port pointer passed to the
+ftdi_sio_port_probe() function, so it can traverse USB data structures
+from there.
+
+Signed-off-by: Mychaela N. Falconia <falcon@freecalypso.org>
+---
+ drivers/usb/serial/ftdi_sio.c | 20 ++++++++++++--------
+ 1 file changed, 12 insertions(+), 8 deletions(-)
+
+diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
+index c867592477c9..0525dab7c281 100644
+--- a/drivers/usb/serial/ftdi_sio.c
++++ b/drivers/usb/serial/ftdi_sio.c
+@@ -88,15 +88,15 @@ struct ftdi_private {
+ struct ftdi_sio_quirk {
+ 	int (*probe)(struct usb_serial *);
+ 	/* Special settings for probed ports. */
+-	void (*port_probe)(struct ftdi_private *);
++	void (*port_probe)(struct usb_serial_port *);
+ };
+ 
+ static int   ftdi_jtag_probe(struct usb_serial *serial);
+ static int   ftdi_NDI_device_setup(struct usb_serial *serial);
+ static int   ftdi_stmclite_probe(struct usb_serial *serial);
+ static int   ftdi_8u2232c_probe(struct usb_serial *serial);
+-static void  ftdi_USB_UIRT_setup(struct ftdi_private *priv);
+-static void  ftdi_HE_TIRA1_setup(struct ftdi_private *priv);
++static void  ftdi_USB_UIRT_setup(struct usb_serial_port *port);
++static void  ftdi_HE_TIRA1_setup(struct usb_serial_port *port);
+ 
+ static const struct ftdi_sio_quirk ftdi_jtag_quirk = {
+ 	.probe	= ftdi_jtag_probe,
+@@ -2270,11 +2270,11 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
+ 
+ 	mutex_init(&priv->cfg_lock);
+ 
+-	if (quirk && quirk->port_probe)
+-		quirk->port_probe(priv);
+-
+ 	usb_set_serial_port_data(port, priv);
+ 
++	if (quirk && quirk->port_probe)
++		quirk->port_probe(port);
++
+ 	ftdi_determine_type(port);
+ 	ftdi_set_max_packet_size(port);
+ 	if (read_latency_timer(port) < 0)
+@@ -2295,8 +2295,10 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
+ /* Setup for the USB-UIRT device, which requires hardwired
+  * baudrate (38400 gets mapped to 312500) */
+ /* Called from usbserial:serial_probe */
+-static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
++static void ftdi_USB_UIRT_setup(struct usb_serial_port *port)
+ {
++	struct ftdi_private *priv = usb_get_serial_port_data(port);
++
+ 	priv->flags |= ASYNC_SPD_CUST;
+ 	priv->custom_divisor = 77;
+ 	priv->force_baud = 38400;
+@@ -2305,8 +2307,10 @@ static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
+ /* Setup for the HE-TIRA1 device, which requires hardwired
+  * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled.  */
+ 
+-static void ftdi_HE_TIRA1_setup(struct ftdi_private *priv)
++static void ftdi_HE_TIRA1_setup(struct usb_serial_port *port)
+ {
++	struct ftdi_private *priv = usb_get_serial_port_data(port);
++
+ 	priv->flags |= ASYNC_SPD_CUST;
+ 	priv->custom_divisor = 240;
+ 	priv->force_baud = 38400;
+-- 
+2.9.0
+