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That's a bug in the driver. > >> It seems to be happen in: >> sd = media_entity_to_v4l2_subdev(pad->entity); >> >> in mxc_isi_crossbar_xlate_streams() >> >> Checking now if the pad variable is the issue >> >> it seems media_pad_remote_pad_first() can return NULL which would cause >> the issue there I think. It does seem like that return value is NULL, so pad->entity dereferences it. I guess a simple check for NULL and then return ERR_PTR(), should it be -EPIPE too as all the other errors in this function? Should there be some error printed? The other error paths seem to be using dev_dbg()