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Message-Id: <1694426069-74140-1-git-send-email-quic_qianyu@quicinc.com>
Date: Mon, 11 Sep 2023 17:54:27 +0800
From: Qiang Yu <quic_qianyu@...cinc.com>
To: mani@...nel.org, quic_jhugo@...cinc.com
Cc: mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, quic_cang@...cinc.com,
quic_mrana@...cinc.com, Qiang Yu <quic_qianyu@...cinc.com>
Subject: [PATCH 0/2] Add lock to avoid race when ringing channel DB
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(-)
--
2.7.4
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