On Mon, Nov 07, 2022 at 09:22:22PM +0800, liulongfang wrote: . > What do you need is the log of this call trace? I mean the functions in the call trace starting from the one that sets the callback to NULL. Cheers -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt