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From: Bhaumik Bhatt <bbhatt@qti.qualcomm.com>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
	loic.poulain@linaro.org, linux-wireless@vger.kernel.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org,
	Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up
Date: Thu,  6 May 2021 12:32:21 -0700	[thread overview]
Message-ID: <1620329545-32328-3-git-send-email-bbhatt@qti.qualcomm.com> (raw)
In-Reply-To: <1620329545-32328-1-git-send-email-bbhatt@qti.qualcomm.com>

From: Bhaumik Bhatt <bbhatt@codeaurora.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@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.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);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2021-05-06 19:33 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 19:32 [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 1/6] bus: mhi: core: Set BHI/BHIe offsets on power up preparation Bhaumik Bhatt
2021-05-06 19:32 ` Bhaumik Bhatt [this message]
2021-05-06 19:32 ` [PATCH v4 3/6] bus: mhi: Add MMIO region length to controller structure Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 4/6] ath11k: set register access length for MHI driver Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 5/6] bus: mhi: pci_generic: Set " Bhaumik Bhatt
2021-05-06 19:32 ` [PATCH v4 6/6] bus: mhi: core: Add range checks for BHI and BHIe Bhaumik Bhatt
2021-05-06 19:51 [PATCH v4 0/6] BHI/BHIe improvements for MHI power purposes Bhaumik Bhatt
2021-05-06 19:51 ` [PATCH v4 2/6] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up Bhaumik Bhatt
2021-05-21 13:37   ` Manivannan Sadhasivam

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