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From: Loic Poulain <loic.poulain@linaro.org>
To: mani@kernel.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
	bbhatt@codeaurora.org, Loic Poulain <loic.poulain@linaro.org>,
	stable@vger.kernel.org
Subject: [PATCH v2] mhi: pci_generic: Graceful shutdown on freeze
Date: Tue, 26 Oct 2021 19:09:40 +0200	[thread overview]
Message-ID: <1635268180-13699-1-git-send-email-loic.poulain@linaro.org> (raw)

There is no reason for shutting down MHI ungracefully on freeze,
this causes the MHI host stack & device stack to not be aligned
anymore since the proper MHI reset sequence is not performed for
ungraceful shutdown.

Cc: stable@vger.kernel.org
Fixes: 5f0c2ee1fe8d ("bus: mhi: pci-generic: Fix hibernation")
Suggested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
---
 v2: Forgot to mention this change comes from a Bhaumik suggestion

 drivers/bus/mhi/pci_generic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index 6a42425..d4a3ce2 100644
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -1018,7 +1018,7 @@ static int __maybe_unused mhi_pci_freeze(struct device *dev)
 	 * context.
 	 */
 	if (test_and_clear_bit(MHI_PCI_DEV_STARTED, &mhi_pdev->status)) {
-		mhi_power_down(mhi_cntrl, false);
+		mhi_power_down(mhi_cntrl, true);
 		mhi_unprepare_after_power_down(mhi_cntrl);
 	}
 
-- 
2.7.4


             reply	other threads:[~2021-10-26 16:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-26 17:09 Loic Poulain [this message]
2021-10-29  9:28 ` [PATCH v2] mhi: pci_generic: Graceful shutdown on freeze Manivannan Sadhasivam
2021-11-18  6:17 ` Manivannan Sadhasivam

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