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From:   Bhaumik Bhatt <bbhatt@codeaurora.org>
To:     manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org
Cc:     linux-arm-msm@vger.kernel.org, loic.poulain@linaro.org,
        jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
        Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v3 2/7] bus: mhi: core: Allow channel to be disabled from stopped state
Date:   Wed,  2 Dec 2020 15:40:33 -0800
Message-Id: <1606952438-15321-3-git-send-email-bbhatt@codeaurora.org>
In-Reply-To: <1606952438-15321-1-git-send-email-bbhatt@codeaurora.org>
References: <1606952438-15321-1-git-send-email-bbhatt@codeaurora.org>
Precedence: bulk

If a channel was explicitly stopped but not reset, allow it to
move to a disabled state so the channel context can be cleaned
up. As the channel remained in a stopped state, its context was
not reset and cleared, which needs to be done if a client driver
module is unloaded or a device crash occurs.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
---
 drivers/bus/mhi/core/init.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index f0697f4..e7b9a90 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1288,7 +1288,8 @@ static int mhi_driver_remove(struct device *dev)
 
 		mutex_lock(&mhi_chan->mutex);
 
-		if (ch_state[dir] == MHI_CH_STATE_ENABLED &&
+		if ((ch_state[dir] == MHI_CH_STATE_ENABLED ||
+		    ch_state[dir] == MHI_CH_STATE_STOP) &&
 		    !mhi_chan->offload_ch)
 			mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
 
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