Hello linux community expert: > > >> Call trace: > > >> gs_read_complete+0x58/0x240 > > >> usb_gadget_giveback_request+0x40/0x160 > > >> dwc3_remove_requests+0x170/0x484 > > >> dwc3_ep0_out_start+0xb0/0x1d4 > > >> __dwc3_gadget_start+0x25c/0x720 > > >> kretprobe_trampoline.cfi_jt+0x0/0x8 > > >> kretprobe_trampoline.cfi_jt+0x0/0x8 > > >> udc_bind_to_driver+0x1d8/0x300 > > >> usb_gadget_probe_driver+0xa8/0x1dc > > >> gadget_dev_desc_UDC_store+0x13c/0x188 > > >> configfs_write_iter+0x160/0x1f4 > > >> vfs_write+0x2d0/0x40c > > >> ksys_write+0x7c/0xf0 > > >> __arm64_sys_write+0x20/0x30 > > >> invoke_syscall+0x60/0x150 > > >> el0_svc_common+0x8c/0xf8 > > >> do_el0_svc+0x28/0xa0 > > >> el0_svc+0x24/0x84 > > >> el0t_64_sync_handler+0x88/0xec > > >> el0t_64_sync+0x1b4/0x1b8 > > >> Code: aa1f03e1 aa1303e0 52800022 2a0103e8 (88e87e62) ---[ end trace > > >> 938847327a739172 ]--- Kernel panic - not syncing: Oops: Fatal > > >> exception > > >> > > >> Signed-off-by: Lianqin Hu <hulianqin@xxxxxxxx> > > >> --- > > >> v1: > > > - Optimize code comments, delete log printing > > > > >Also, same comment as before, what: > > > - causes port to be NULL > > When unbind, the gser_unbind function call gserial_disconnect to set gser->ioport = NULL, and struct gs_port *port = gser->ioport, resulting in port being NULL. > > It seems that there is a potential competition between the gs_read_complete function and the gserial_disconnect function. > Then fix that properly please. OK, we are preparing a new patch and will submit the new version patch later. >Any specific reason you ignored my previous review comments? Replying here in response to a question asked previously. Thanks
