linux-kernel - [PATCH] net: qrtr: Unprepare MHI channels during remove

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Message-Id: <1605723625-11206-1-git-send-email-bbhatt@codeaurora.org>
Date:   Wed, 18 Nov 2020 10:20:25 -0800
From:   Bhaumik Bhatt <bbhatt@...eaurora.org>
To:     manivannan.sadhasivam@...aro.org
Cc:     kvalo@...eaurora.org, linux-wireless@...r.kernel.org,
        cjhuang@...eaurora.org, linux-arm-msm@...r.kernel.org,
        hemantk@...eaurora.org, linux-kernel@...r.kernel.org,
        ath11k@...ts.infradead.org, clew@...eaurora.org,
        loic.poulain@...aro.org, netdev@...r.kernel.org,
        Bhaumik Bhatt <bbhatt@...eaurora.org>
Subject: [PATCH] net: qrtr: Unprepare MHI channels during remove

Reset MHI device channels when driver remove is called due to
module unload or any crash scenario. This will make sure that
MHI channels no longer remain enabled for transfers since the
MHI stack does not take care of this anymore after the auto-start
channels feature was removed.

Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
---
 net/qrtr/mhi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c
index 7100f0b..2bf2b19 100644
--- a/net/qrtr/mhi.c
+++ b/net/qrtr/mhi.c
@@ -104,6 +104,7 @@ static void qcom_mhi_qrtr_remove(struct mhi_device *mhi_dev)
 	struct qrtr_mhi_dev *qdev = dev_get_drvdata(&mhi_dev->dev);
 
 	qrtr_endpoint_unregister(&qdev->ep);
+	mhi_unprepare_from_transfer(mhi_dev);
 	dev_set_drvdata(&mhi_dev->dev, NULL);
 }
 
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