1. We need a write lock in mhi_gen_tre otherwise there is race of the WP used for ringing channel DB between mhi_queue and M0 transition. 2. We can not invoke local_bh_enable() when irqs are disabled, so move read_lock_irqsave() under the mhi_gen_tre() since we add write_lock_bh() in mhi_gen_tre(). v1 -> v2: Added write_unlock_bh(&mhi_chan->lock) in mhi_gen_tre() before return because of error process. Bhaumik Bhatt (1): bus: mhi: host: Add spinlock to protect WP access when queueing TREs Hemant Kumar (1): bus: mhi: host: Take irqsave lock after TRE is generated drivers/bus/mhi/host/main.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) -- 2.7.4
