修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/net/caif/caif_usb.c
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@@ -1,9 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * CAIF USB handler
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  * Copyright (C) ST-Ericsson AB 2011
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  * Author:	Sjur Brendeland
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- * License terms: GNU General Public License (GPL) version 2
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- *
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
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@@ -63,7 +62,7 @@
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 	hpad = (info->hdr_len + CFUSB_PAD_DESCR_SZ) & (CFUSB_ALIGNMENT - 1);
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 	if (skb_headroom(skb) < ETH_HLEN + CFUSB_PAD_DESCR_SZ + hpad) {
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-		pr_warn("Headroom to small\n");
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+		pr_warn("Headroom too small\n");
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 		kfree_skb(skb);
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 		return -EIO;
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 	}
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@@ -135,6 +134,9 @@
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 	struct usb_device *usbdev;
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 	int res;
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+	if (what == NETDEV_UNREGISTER && dev->reg_state >= NETREG_UNREGISTERED)
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+		return 0;
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+
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 	/* Check whether we have a NCM device, and find its VID/PID. */
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 	if (!(dev->dev.parent && dev->dev.parent->driver &&
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 	      strcmp(dev->dev.parent->driver->name, "cdc_ncm") == 0))