On 24 February 2017 at 01:28, <greearb@xxxxxxxxxxxxxxx> wrote: > Modify the receive-from-user-space logic to do length > and 'is-down' checks before trying to allocate an skb. > > And, if we are going to ignore the pkt due to radio idle, > then do not return an error code to user-space. User-space > cannot reliably know exactly when a radio is idle or not. You probably want to return some error code anyway because 0, if you compare to the kernel medium, currently maps to the ack returned bit and is possibly the only way for userspace to set the HWSIM_TX_STAT_ACK flag in a meaningful way. Best regards