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[0/2] Add lock to avoid race when ringing channel DB

Message ID 1694426069-74140-1-git-send-email-quic_qianyu@quicinc.com
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Series Add lock to avoid race when ringing channel DB | expand

Message

Qiang Yu Sept. 11, 2023, 9:54 a.m. UTC 
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().

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 | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)