linux-postmarketos-allwinner: Import patch for u_ether regression (MR 4706)

This fixes the USB networking issue, see:
https://patchwork.kernel.org/project/linux-usb/patch/20231218164532.411125-2-mailingradian@gmail.com/

Thanks to Alexey Min to pointing me at the patch!

[ci:skip-build]: Already built successfully in CI.

device/main/linux-postmarketos-allwinner/0015-usb-gadget-u_ether-Re-attach-netif-device-to-mirror.patch

+From 5f4158b3feecb4cc9fcae276cec2352ae3a03ec2 Mon Sep 17 00:00:00 2001
+From: Richard Acayan <mailingradian@gmail.com>
+Date: Mon, 18 Dec 2023 11:45:33 -0500
+Subject: [PATCH] usb: gadget: u_ether: Re-attach netif device to mirror
+ detachment
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+In 6.7-rc1, there was a netif_device_detach call added to the
+gether_disconnect function. This clears the __LINK_STATE_PRESENT bit of
+the netif device and suppresses pings (ICMP messages) and TCP connection
+requests from the connected host. If userspace temporarily disconnects
+the gadget, such as by temporarily removing configuration in the gadget
+configfs interface, network activity should continue to be processed
+when the gadget is re-connected. Mirror the netif_device_detach call
+with a netif_device_attach call in gether_connect to fix re-connecting
+gadgets.
+
+Link: https://gitlab.com/postmarketOS/pmaports/-/tree/6002e51b7090aeeb42947e0ca7ec22278d7227d0/main/postmarketos-base-ui/rootfs-usr-lib-NetworkManager-dispatcher.d-50-tethering.sh
+Fixes: f49449fbc21e ("usb: gadget: u_ether: Replace netif_stop_queue with netif_device_detach")
+Signed-off-by: Richard Acayan <mailingradian@gmail.com>
+Tested-by: Luca Weiss <luca@z3ntu.xyz>
+Tested-by: Duje Mihanović <duje.mihanovic@skole.hr>
+---
+ drivers/usb/gadget/function/u_ether.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
+index 18fc4fb011..5817a0993a 100644
+--- a/drivers/usb/gadget/function/u_ether.c
++++ b/drivers/usb/gadget/function/u_ether.c
+@@ -1159,6 +1159,8 @@ struct net_device *gether_connect(struct gether *link)
+ 		if (netif_running(dev->net))
+ 			eth_start(dev, GFP_ATOMIC);
+ 
++		netif_device_attach(dev->net);
++
+ 	/* on error, disable any endpoints  */
+ 	} else {
+ 		(void) usb_ep_disable(link->out_ep);
+-- 
+2.43.0
+

device/main/linux-postmarketos-allwinner/APKBUILD

@@ -46,6 +46,7 @@ source="$pkgname-$_tag.tar.gz::https://codeberg.org/megi/linux/archive/$_tag.tar
 	0012-arm64-dts-allwinner-orangepi-3-fix-ethernet.patch
 	0013-Revert-usb-quirks-Add-USB_QUIRK_RESET-for-Quectel-EG25G-Modem.patch
 	0014-usb-serial-option-add-reset-resume-callback-for-WWAN.patch
+	0015-usb-gadget-u_ether-Re-attach-netif-device-to-mirror.patch
 	"
 builddir="$srcdir/linux"
 
@@ -100,4 +101,5 @@ b7c084bb32cfc18defcec77966f1944fd3b33bb48769a4c0e257709d0f3898c5e0ca2a50c39a5d45
 370e963805a4c984dc501a6a6f686cac059485a275370c5f55de0841e227c5f6652abb38ad935c8dd046014e632e70129d3f8fbeae9650fe7de6f0d10e9cdc3a  0012-arm64-dts-allwinner-orangepi-3-fix-ethernet.patch
 c766911f76d36b997582533707d7d7a089ed1272e49a79dbe75f7c1eafef0ba3f1417d6c66f25e12e56124e0cd4bb9f443d400236e252ef1c43d53def9392a87  0013-Revert-usb-quirks-Add-USB_QUIRK_RESET-for-Quectel-EG25G-Modem.patch
 382e6e8785235788101459ae47c940ec85831007c61e3f14c4e3a43abfa21b95cdaa6bdd1b7fdd6fd26944f4c629d41b9ab776e89d9a18778fbc9f6a7785444b  0014-usb-serial-option-add-reset-resume-callback-for-WWAN.patch
+3ce3bc02e4cb401f5834b9607d50fe26e0cbd7d6f5e32f1ab092660185ff01b253a759be5e6dfb46aa629dc0871f935d93746a0b55ede49f194b617dda87f766  0015-usb-gadget-u_ether-Re-attach-netif-device-to-mirror.patch
 "