Hello Jakub, On Thu, Mar 21, 2024 at 03:17:44PM -0700, Jakub Kicinski wrote: > On Thu, 21 Mar 2024 15:02:39 -0700 Jeff Johnson wrote: > > >> As suggested there we should just use kmalloc/kfree to match the existing logic. > > > > > > Please no. There is no magic here. alloc + free must match whether > > > you're using magic object alloc wrapper (alloc_netdev()) or straight > > > up kzalloc(). > > > > Based upon the ath11k patch there must be something going on with > > alloc_netdev()/free_netdev() that doesn't occur when these aren't used. > > Looks like init_dummy_netdev wipes the netdev structure clean, so I > don't think we can use it directly as the setup function, Breno :( Before my patch, init_dummy_netdev was being also used. The patch was basically replacing the init_dummy_netdev by alloc_netdev() with will call "setup(dev);" later. - init_dummy_netdev(&irq_grp->napi_ndev); + irq_grp->napi_ndev = alloc_netdev(0, "dummy", NET_NAME_UNKNOWN, + init_dummy_netdev); I am wondering if alloc_netdev() is messing with something instead of init_dummy_netdev(). Also, Kalle's crash is during rmmod, and not during initialization. getting NULL after free_netdev() is called. > Maybe we should add a new helper to "alloc dummy netdev" which can > call alloc_netdev() with right arguments and do necessary init? What are the right arguments in this case? Thanks!
