6.9-stable review patch. If anyone has any objections, please let me know.
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From: Ferry Toth ftoth@exalondelft.nl
commit c50814a288dcee687285abc0cf935e9fe8928e59 upstream.
This reverts commit f49449fbc21e7e9550a5203902d69c8ae7dfd918.
This commit breaks u_ether on some setups (at least Merrifield). The fix "usb: gadget: u_ether: Re-attach netif device to mirror detachment" party restores u-ether. However the netif usb: remains up even usb is switched from device to host mode. This creates problems for user space as the interface remains in the routing table while not realy present and network managers (connman) not detecting a network change.
Various attempts to find the root cause were unsuccesful up to now. Therefore revert until a solution is found.
Link: https://lore.kernel.org/linux-usb/20231006141231.7220-1-hgajjar@de.adit-jv.c... Reported-by: Andy Shevchenko andriy.shevchenko@intel.com Reported-by: Ferry Toth fntoth@gmail.com Fixes: f49449fbc21e ("usb: gadget: u_ether: Replace netif_stop_queue with netif_device_detach") Cc: stable@vger.kernel.org Signed-off-by: Ferry Toth fntoth@gmail.com Link: https://lore.kernel.org/r/20240620204832.24518-3-ftoth@exalondelft.nl Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/u_ether.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -1200,7 +1200,7 @@ void gether_disconnect(struct gether *li
DBG(dev, "%s\n", __func__);
- netif_device_detach(dev->net); + netif_stop_queue(dev->net); netif_carrier_off(dev->net);
/* disable endpoints, forcing (synchronous) completion