Hello all, while doing some tests on kernel 6.1 the following warning is hit sporadically: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1385 at drivers/usb/gadget/udc/core.c:295 usb_ep_queue+0x58/0x6c Modules linked in: 8021q bnep mcp251x mwifiex_sdio mwifiex cfg80211 btmrvl_sdio btmrvl imx_sdma fuse CPU: 0 PID: 1385 Comm: analogclock Not tainted 6.1.66-6.5.0-devel+git.6c6a6c7e211c #1 Hardware name: Freescale i.MX6 Ultralite (Device Tree) unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x40/0x4c dump_stack_lvl from __warn+0x88/0xc0 __warn from warn_slowpath_fmt+0x10c/0x1a0 warn_slowpath_fmt from usb_ep_queue+0x58/0x6c usb_ep_queue from eth_start_xmit+0x1ec/0x330 eth_start_xmit from dev_hard_start_xmit+0x7c/0xf8 dev_hard_start_xmit from sch_direct_xmit+0x110/0x310 sch_direct_xmit from __qdisc_run+0x110/0x5d8 __qdisc_run from net_tx_action+0x170/0x20c net_tx_action from __do_softirq+0xc0/0x234 __do_softirq from __irq_exit_rcu+0x8c/0xb8 __irq_exit_rcu from irq_exit+0x8/0x10 irq_exit from call_with_stack+0x18/0x20 call_with_stack from __irq_usr+0x7c/0xa0 Exception stack(0xe0fcdfb0 to 0xe0fcdff8) dfa0: b2f9e000 b30775a0 0002edf8 00000000 dfc0: 01493268 014fdd00 0002edf8 0002edf8 000185b8 be8d9734 b3f6f811 0000000c dfe0: b2fb4580 be8d95f4 b3f6f7d3 b64006a8 20070010 ffffffff ---[ end trace 0000000000000000 ]--- The warning is happening during a suspend/resume test (not sure which one of the twos), I cannot really tell if this is a regression (and from which version, eventually), but this is happening since a while with multiple 6.1 kernel version (this last log is from a recent 6.1.66). I cannot really tell the current status with mainline or v6.6 given that it does not seems so trivial to reproduce. It happened on various arm and arm64 machine. The ethernet device is a USB NCM/ECM, running in gadget mode. Any idea? Francesco
