1 files changed, 112 insertions, 0 deletions
diff --git a/01-fix-alloc_tty_driver.patch b/01-fix-alloc_tty_driver.patch
new file mode 100644
index 000000000000..25f6729abbc3
--- /dev/null
+++ b/01-fix-alloc_tty_driver.patch
@@ -0,0 +1,112 @@
+*** a/blackmagic-io-12.2a12/bmio_serial.c	2021-11-10 13:53:06.486238131 +0100
+--- b/blackmagic-io-12.2a12/bmio_serial.c	2021-11-10 13:53:12.872862463 +0100
+*************** int bmio_serial_driver_init(void)
+*** 304,310 ****
+  {
+  	int ret;
+
+! 	struct tty_driver* serial = alloc_tty_driver(MAX_SERIAL_LINES);
+  	if (!serial)
+  		return -ENOMEM;
+
+--- 304,316 ----
+  {
+  	int ret;
+
+! 	struct tty_driver* serial;
+! #if KERNEL_VERSION_OR_LATER(5, 15, 0)
+!     serial = tty_alloc_driver(MAX_SERIAL_LINES, 0);
+! #else
+! 	serial = alloc_tty_driver(MAX_SERIAL_LINES);
+! #endif
+!
+  	if (!serial)
+  		return -ENOMEM;
+
+*************** int bmio_serial_driver_init(void)
+*** 324,330 ****
+--- 330,340 ----
+  	ret = tty_register_driver(serial);
+  	if (ret)
+  	{
++ #if KERNEL_VERSION_OR_LATER(5, 15, 0)
++         tty_driver_kref_put(serial);
++ #else
+  		put_tty_driver(serial);
++ #endif
+  		return ret;
+  	}
+
+*************** void bmio_serial_driver_exit(void)
+*** 340,346 ****
+--- 350,362 ----
+  	if (serial_driver)
+  	{
+  		tty_unregister_driver(serial_driver);
++
++ #if KERNEL_VERSION_OR_LATER(5, 15, 0)
++ 		tty_driver_kref_put(serial_driver);
++ #else
+  		put_tty_driver(serial_driver);
++ #endif
++
+  		serial_driver = NULL;
+  	}
+  }
+
+*** a/blackmagic-12.2a12/blackmagic_serial.c	2021-11-10 13:52:55.462977861 +0100
+--- b/blackmagic-12.2a12/blackmagic_serial.c	2021-11-10 13:53:12.872862463 +0100
+*************** int __init blackmagic_serial_init(void)
+*** 613,619 ****
+--- 613,623 ----
+  	int ret;
+  	struct tty_driver *driver;
+
++ #if KERNEL_VERSION_OR_LATER(5, 15, 0)
++     driver = tty_alloc_driver(BLACKMAGIC_SERIAL_MINORS, 0);
++ #else
+  	driver = alloc_tty_driver(BLACKMAGIC_SERIAL_MINORS);
++ #endif
+  	if (!driver)
+  		return -ENOMEM;
+
+*************** int __init blackmagic_serial_init(void)
+*** 639,645 ****
+
+  abort:
+  	printk(KERN_ERR "failed to register blackmagic serial driver");
+! 	put_tty_driver(driver);
+  	return ret;
+  }
+
+--- 643,653 ----
+
+  abort:
+  	printk(KERN_ERR "failed to register blackmagic serial driver");
+! #if KERNEL_VERSION_OR_LATER(5, 15, 0)
+!     tty_driver_kref_put(driver);
+! #else
+!     put_tty_driver(driver);
+! #endif
+  	return ret;
+  }
+
+*************** void __exit blackmagic_serial_exit(void)
+*** 648,653 ****
+  	if (blackmagic_tty_driver)
+  	{
+  		tty_unregister_driver(blackmagic_tty_driver);
+! 		put_tty_driver(blackmagic_tty_driver);
+  	}
+  }
+--- 656,665 ----
+  	if (blackmagic_tty_driver)
+  	{
+  		tty_unregister_driver(blackmagic_tty_driver);
+! #if KERNEL_VERSION_OR_LATER(5, 15, 0)
+!         tty_driver_kref_put(blackmagic_tty_driver);
+! #else
+!         put_tty_driver(blackmagic_tty_driver);
+! #endif
+  	}
+  }