wifi: rtl8xxxu: Dump the efuse right after reading it

Someone reported a problem with their TP-Link WN722N (RTL8188EUS):

usb 1-1: This Realtek USB WiFi dongle (0x2357:0x010c) is untested!
usb 1-1: Please report results to Jes.Sorensen@gmail.com
usb 1-1: Fatal - failed to parse EFuse
rtl8xxxu: probe of 1-1:1.0 failed with error -22

This error can happen when the first two bytes of the efuse don't have
the expected magic value of 0x8129. In a situation like this it could
be useful to see the contents of the efuse.

Dump the efuse right after reading it, before trying to parse it.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/1f544dc4-17f6-4401-995d-5cb4567b82fa@gmail.com

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index 2d88b7fba3173a64045b43d5432ab91bb086c21f..cf631df54fa5fed58ff103c66132e1c6d59ac5a8 100644 (file)
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -7910,15 +7910,15 @@ static int rtl8xxxu_probe(struct usb_interface *interface,
                goto err_set_intfdata;
        }
 
+       if (rtl8xxxu_debug & RTL8XXXU_DEBUG_EFUSE)
+               rtl8xxxu_dump_efuse(priv);
+
        ret = priv->fops->parse_efuse(priv);
        if (ret) {
                dev_err(&udev->dev, "Fatal - failed to parse EFuse\n");
                goto err_set_intfdata;
        }
 
-       if (rtl8xxxu_debug & RTL8XXXU_DEBUG_EFUSE)
-               rtl8xxxu_dump_efuse(priv);
-
        rtl8xxxu_print_chipinfo(priv);
 
        ret = priv->fops->load_firmware(priv);