diff --git a/target/linux/generic/hack-5.4/993-usb-serial-option-add-u9300.patch b/target/linux/generic/hack-5.4/993-usb-serial-option-add-u9300.patch
new file mode 100644
index 0000000000..4e3314fada
--- /dev/null
+++ b/target/linux/generic/hack-5.4/993-usb-serial-option-add-u9300.patch
@@ -0,0 +1,46 @@
+--- a/drivers/net/usb/qmi_wwan.c
++++ b/drivers/net/usb/qmi_wwan.c
+@@ -1370,6 +1370,7 @@ static const struct usb_device_id produc
+ 	{QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)},	/* HP lt4120 Snapdragon X5 LTE */
+ 	{QMI_FIXED_INTF(0x22de, 0x9061, 3)},	/* WeTelecom WPD-600N */
+ 	{QMI_QUIRK_SET_DTR(0x1e0e, 0x9001, 5)},	/* SIMCom 7100E, 7230E, 7600E ++ */
++	{QMI_FIXED_INTF(0x1c9e, 0x9b3c, 4)},	/* LONGSUNG_U9300 */
+ 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)},	/* Quectel EC21 Mini PCIe */
+ 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0191, 4)},	/* Quectel EG91 */
+ 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0195, 4)},	/* Quectel EG95 */
+--- a/drivers/usb/serial/option.c
++++ b/drivers/usb/serial/option.c
+@@ -383,6 +383,7 @@ static void option_instat_callback(struc
+  * Mobidata, etc sell under their own brand names.
+  */
+ #define LONGCHEER_VENDOR_ID			0x1c9e
++#define LONGSUNG_U9300_PRODUCT_ID		0x9b3c
+ 
+ /* 4G Systems products */
+ /* This is the 4G XS Stick W14 a.k.a. Mobilcom Debitel Surf-Stick *
+@@ -578,6 +579,16 @@ static void option_instat_callback(struc
+ /* Device needs ZLP */
+ #define ZLP		BIT(17)
+ 
++struct option_blacklist_info {
++	/* bitfield of interface numbers for OPTION_BLACKLIST_SENDSETUP */
++	const unsigned long sendsetup;
++	/* bitfield of interface numbers for OPTION_BLACKLIST_RESERVED_IF */
++	const unsigned long reserved;
++};
++
++static const struct option_blacklist_info longsung_u9300_blacklist = {
++	.reserved = BIT(4),
++};
+ 
+ static const struct usb_device_id option_ids[] = {
+ 	{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
+@@ -612,6 +623,8 @@ static const struct usb_device_id option
+ 	{ USB_DEVICE(QUANTA_VENDOR_ID, QUANTA_PRODUCT_GLE) },
+ 	{ USB_DEVICE(QUANTA_VENDOR_ID, 0xea42),
+ 	  .driver_info = RSVD(4) },
++	{ USB_DEVICE(LONGCHEER_VENDOR_ID,LONGSUNG_U9300_PRODUCT_ID),
++	  .driver_info = (kernel_ulong_t)&longsung_u9300_blacklist},
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1c05, USB_CLASS_COMM, 0x02, 0xff) },
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1c1f, USB_CLASS_COMM, 0x02, 0xff) },
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1c23, USB_CLASS_COMM, 0x02, 0xff) },
diff --git a/target/linux/generic/pending-5.4/601-add-kernel-imq-support.patch b/target/linux/generic/pending-5.4/601-add-kernel-imq-support.patch
index 87da85b983..9278263c75 100644
--- a/target/linux/generic/pending-5.4/601-add-kernel-imq-support.patch
+++ b/target/linux/generic/pending-5.4/601-add-kernel-imq-support.patch
@@ -1456,7 +1456,7 @@ diff -Naupr linux-5.4.10_orig/net/core/skbuff.c linux-5.4.10/net/core/skbuff.c
  
  	/* Note : this field could be in headers_start/headers_end section
  	 * It is not yet because we do not want to have a 16 bit hole
-@@ -4155,6 +4230,13 @@ void __init skb_init(void)
+@@ -4161,6 +4236,13 @@ void __init skb_init(void)
  						0,
  						SLAB_HWCACHE_ALIGN|SLAB_PANIC,
  						NULL);