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Subject: Re: [PATCH v7 2/3] net: qrtr: support suspend/hibernation
From: Kalle Valo <kvalo@kernel.org>
In-Reply-To: <20240305021320.3367-3-quic_bqiang@quicinc.com>
References: <20240305021320.3367-3-quic_bqiang@quicinc.com>
To: Baochen Qiang <quic_bqiang@quicinc.com>
Cc: <ath11k@lists.infradead.org>, <manivannan.sadhasivam@linaro.org>,
 <linux-wireless@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
 <mhi@lists.linux.dev>, <quic_bqiang@quicinc.com>, <davem@davemloft.net>,
 <edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>,
 <netdev@vger.kernel.org>
User-Agent: pwcli/0.1.1-git (https://github.com/kvalo/pwcli/) Python/3.11.2
Message-ID: <171266302937.3197288.10067259080549350573.kvalo@kernel.org>
Date: Tue,  9 Apr 2024 11:43:51 +0000 (UTC)

Baochen Qiang <quic_bqiang@quicinc.com> wrote:

> MHI devices may not be destroyed during suspend/hibernation, so need
> to unprepare/prepare MHI channels throughout the transition, this is
> done by adding suspend/resume callbacks.
> 
> The suspend callback is called in the late suspend stage, this means
> MHI channels are still alive at suspend stage, and that makes it
> possible for an MHI controller driver to communicate with others over
> those channels at suspend stage. While the resume callback is called
> in the early resume stage, for a similar reason.
> 
> Also note that we won't do unprepare/prepare when MHI device is in
> suspend state because it's pointless if MHI is only meant to go through
> a suspend/resume transition, instead of a complete power cycle.
> 
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30
> 
> Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

2 patches applied to ath-next branch of ath.git, thanks.

e0cd1185900e net: qrtr: support suspend/hibernation
166a490f59ac wifi: ath11k: support hibernation

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20240305021320.3367-3-quic_bqiang@quicinc.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches