linux-kernel - Re: [PATCH v2 3/3] bus: mhi: keep device context through suspend cycles

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Message-ID: <2025071617-munchkin-staring-70c9@gregkh>
Date: Wed, 16 Jul 2025 11:35:25 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: Manivannan Sadhasivam <mani@...nel.org>,
	Jeff Hugo <jeff.hugo@....qualcomm.com>,
	Youssef Samir <quic_yabdulra@...cinc.com>,
	Matthew Leung <quic_mattleun@...cinc.com>,
	Alexander Wilhelm <alexander.wilhelm@...termo.com>,
	Kunwu Chan <chentao@...inos.cn>,
	Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
	Jacek Lawrynowicz <jacek.lawrynowicz@...ux.intel.com>,
	Yan Zhen <yanzhen@...o.com>, Sujeev Dias <sdias@...eaurora.org>,
	Siddartha Mohanadoss <smohanad@...eaurora.org>, mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...labora.com, stable@...r.kernel.org
Subject: Re: [PATCH v2 3/3] bus: mhi: keep device context through suspend
 cycles

On Tue, Jul 15, 2025 at 06:25:09PM +0500, Muhammad Usama Anjum wrote:
> Don't deinitialize the device context while going into suspend or
> hibernation cycles. Otherwise the resume may fail if at resume time, the
> memory pressure is high and no dma memory is available. At resume, only
> reset the read/write ring pointers as rings may have stale data.


Same here, don't do this.

thanks,

greg k-h