apply rtl8723cs bluetooth only with kernels >= 6.1

Author: paolosabatino

lib/functions/compilation/patch/drivers_network.sh

@@ -587,15 +587,20 @@ driver_rtl8723cs() {
 
 	# -- BLUETOOTH --
 	# these few patches address some issues to let the rtl8723cs/rtl8703b chipsets to be used within the serdev framework
-	if linux-version compare "${version}" ge 6.2 && linux-version compare "${version}" lt 6.3; then # landed in 6.1.30/6.3.4 # keep for 6.2
-		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-btrtl-quirk-local-ext-features.patch" "applying"
-		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/Bluetooth-btrtl-add-support-for-the-RTL8723CS.patch" "applying"
-	fi
+	# Available only with kernels >= 6.1, because bt driver does not exist in older kernels
+	if linux-version compare "${version}" ge 6.1; then
+
+		if linux-version compare "${version}" ge 6.2 && linux-version compare "${version}" lt 6.3; then # landed in 6.1.30/6.3.4 # keep for 6.2
+			process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-btrtl-quirk-local-ext-features.patch" "applying"
+			process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/Bluetooth-btrtl-add-support-for-the-RTL8723CS.patch" "applying"
+		fi
+
+		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/Bluetooth-hci_h5-Add-support-for-binding-RTL8723CS-with-device-.patch" "applying"
+		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-h5-Don-t-re-initialize-rtl8723cs-on-resume.patch" "applying"
+		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-btrtl-add-rtl8703bs.patch" "applying"
+		process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/dt-bindings-net-bluetooth-Add-rtl8723bs-bluetooth.patch" "applying"
 
-	process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/Bluetooth-hci_h5-Add-support-for-binding-RTL8723CS-with-device-.patch" "applying"
-	process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-h5-Don-t-re-initialize-rtl8723cs-on-resume.patch" "applying"
-	process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/bluetooth-btrtl-add-rtl8703bs.patch" "applying"
-	process_patch_file "${SRC}/patch/misc/bluetooth-rtl8723cs/dt-bindings-net-bluetooth-Add-rtl8723bs-bluetooth.patch" "applying"
+	fi
 
 	# -- WIFI --
 	# Wireless patches; do note kernels >= 6.19 do not need this because it has been superseded by mainline rtw88 driver.