On Wed, 22 Jul 2020 at 10:00, Jason Wang <jasow...@redhat.com> wrote: > > In loopback mode, e1000e RX can DMA into TX doorbell which requires > TX to be reentrant. This patch make e1000e's TX routine reentrant by > introducing a per device boolean for recording whether or not a TX > rountine is being called and return early. > > Signed-off-by: Jason Wang <jasow...@redhat.com> > ---
This feels like a sticking-plaster fix that's not really in the right place... It stops us from calling back into e1000e_start_xmit(), but it doesn't prevent a DMA request from touching other device registers that update state in the E100ECore struct that the transmit code is not expecting to change. thanks -- PMM
