linux-kernel - [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up

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Message-Id: <1620329545-32328-3-git-send-email-bbhatt@qti.qualcomm.com>
Date:   Thu,  6 May 2021 12:32:21 -0700
From:   Bhaumik Bhatt <bbhatt@....qualcomm.com>
To:     manivannan.sadhasivam@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org, linux-wireless@...r.kernel.org,
        kvalo@...eaurora.org, ath11k@...ts.infradead.org,
        Bhaumik Bhatt <bbhatt@...eaurora.org>
Subject: [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up

From: Bhaumik Bhatt <bbhatt@...eaurora.org>

Set the BHI and BHIe pointers to NULL as part of clean-up. This
makes sure that stale pointers are not accessed after powering
MHI down.

Suggested-by: Hemant Kumar <hemantk@...eaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>
---
 drivers/bus/mhi/core/init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 11c7a3d..1cc2f22 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1132,6 +1132,9 @@ void mhi_unprepare_after_power_down(struct mhi_controller *mhi_cntrl)
 		mhi_cntrl->rddm_image = NULL;
 	}
 
+	mhi_cntrl->bhi = NULL;
+	mhi_cntrl->bhie = NULL;
+
 	mhi_deinit_dev_ctxt(mhi_cntrl);
 }
 EXPORT_SYMBOL_GPL(mhi_unprepare_after_power_down);
-- 
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