On Fri, May 24, 2024 at 06:26:43PM -0700, Chris Lew wrote: > From: Richard Maina <quic_rmaina@xxxxxxxxxxx> > > When remoteproc goes down unexpectedly this results in a state where any > acquired hwspinlocks will remain locked possibly resulting in deadlock. > In order to ensure all locks are freed we include a call to > qcom_smem_bust_hwspin_lock_by_host() during remoteproc shutdown. > > For qcom_q6v5_pas remoteprocs, each remoteproc has an assigned smem > host_id. Remoteproc can pass this id to smem to try and bust the lock on > remoteproc stop. > > This edge case only occurs with q6v5_pas watchdog crashes. The error > fatal case has handling to clear the hwspinlock before the error fatal > interrupt is triggered. > > Signed-off-by: Richard Maina <quic_rmaina@xxxxxxxxxxx> > Signed-off-by: Chris Lew <quic_clew@xxxxxxxxxxx> Reviewed-by: Bjorn Andersson <andersson@xxxxxxxxxx> Regards, Bjorn
