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From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: gregkh@linuxfoundation.org
Cc: hemantk@codeaurora.org, bbhatt@codeaurora.org,
	linux-arm-msm@vger.kernel.org, jhugo@codeaurora.org,
	linux-kernel@vger.kernel.org, loic.poulain@linaro.org,
	kvalo@codeaurora.org, ath11k@lists.infradead.org,
	stable@vger.kernel.org, Jeffrey Hugo <quic_jhugo@quicinc.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH 06/10] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up
Date: Fri, 25 Jun 2021 18:03:51 +0530	[thread overview]
Message-ID: <20210625123355.11578-7-manivannan.sadhasivam@linaro.org> (raw)
In-Reply-To: <20210625123355.11578-1-manivannan.sadhasivam@linaro.org>

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.

Cc: stable@vger.kernel.org
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>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1620330705-40192-3-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.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 11c7a3d3c9bf..1cc2f225d3d1 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);
-- 
2.25.1


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  parent reply	other threads:[~2021-06-25 12:34 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25 12:33 [PATCH 00/10] MHI patches for v5.14 - Take 2 Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 01/10] bus: mhi: Add inbound buffers allocation flag Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 02/10] bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 03/10] bus: mhi: pci_generic: Add Cinterion MV31-W PCIe to MHI Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 04/10] bus: mhi: core: Validate channel ID when processing command completions Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 05/10] bus: mhi: core: Set BHI/BHIe offsets on power up preparation Manivannan Sadhasivam
2021-06-25 12:33 ` Manivannan Sadhasivam [this message]
2021-06-25 12:38   ` [PATCH 06/10] bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up Greg KH
2021-06-25 13:03     ` Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 07/10] bus: mhi: Add MMIO region length to controller structure Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 08/10] ath11k: set register access length for MHI driver Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 09/10] bus: mhi: pci_generic: Set " Manivannan Sadhasivam
2021-06-25 12:33 ` [PATCH 10/10] bus: mhi: core: Add range checks for BHI and BHIe Manivannan Sadhasivam
2021-06-30 13:16 ` [PATCH 00/10] MHI patches for v5.14 - Take 2 Manivannan Sadhasivam
2021-06-30 13:25   ` Greg KH

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