LG gram laptops support mac address pass-thru with usb lan adapter
rtl8153b-2 devices using Realtek USB ethernet Vendor and Product IDs.
ACPI objects of the gram laptops are safisfied to -AD.
Signed-off-by: mike.seo <mike.seo@xxxxxxx>
---
drivers/net/usb/r8152.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index a5612c799f5e..3d4ffc582730 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -29,6 +29,7 @@
#include <crypto/hash.h>
#include <linux/usb/r8152.h>
#include <net/gso.h>
+#include <linux/dmi.h>
/* Information for net-next */
#define NETNEXT_VERSION "12"
@@ -949,6 +950,7 @@ struct r8152 {
u32 support_2500full:1;
u32 lenovo_macpassthru:1;
+ u32 lg_macpassthru:1;
u32 dell_tb_rx_agg_bug:1;
u16 ocp_base;
u16 speed;
@@ -1724,7 +1726,7 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa)
} else {
/* test for -AD variant of RTL8153 */
ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
- if ((ocp_data & AD_MASK) == 0x1000) {
+ if ((ocp_data & AD_MASK) == 0x1000 || tp->lg_macpassthru) {
/* test for MAC address pass-through bit */
ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, EFUSE);
if ((ocp_data & PASS_THRU_MASK) != 1) {
@@ -9798,6 +9800,19 @@ static bool rtl8152_supports_lenovo_macpassthru(struct usb_device *udev)
return 0;
}
+static bool rtl8152_supports_lg_macpassthru(struct usb_device *udev)
+{
+ int product_id = le16_to_cpu(udev->descriptor.idProduct);
+ int vendor_id = le16_to_cpu(udev->descriptor.idVendor);
+ const char *board = dmi_get_system_info(DMI_BOARD_VENDOR);
+
+ if (!strncmp("LG Electronics", board, sizeof("LG Electronics"))) {
+ if (vendor_id == VENDOR_ID_REALTEK && product_id == 0x8153)
+ return 1;
+ }
+ return 0;
+}
+
static int rtl8152_probe_once(struct usb_interface *intf,
const struct usb_device_id *id, u8 version)
{
@@ -9872,6 +9887,7 @@ static int rtl8152_probe_once(struct usb_interface *intf,
}
tp->lenovo_macpassthru = rtl8152_supports_lenovo_macpassthru(udev);
+ tp->lg_macpassthru = rtl8152_supports_lg_macpassthru(udev);
if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial &&
(!strcmp(udev->serial, "000001000000") ||
--
2.43.0
