linux-kernel - Re: [PATCH v2 5/5] bus: host: mhi: Need to honor sys_err at power

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Message-ID: <f80d4e32-0f28-4a90-9db4-05c95e260658@oss.qualcomm.com>
Date: Thu, 10 Jul 2025 14:46:51 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Vivek.Pernamitta@...cinc.com, Manivannan Sadhasivam <mani@...nel.org>
Cc: mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vivek Pernamitta <quic_vpernami@...cinc.com>
Subject: Re: [PATCH v2 5/5] bus: host: mhi: Need to honor sys_err at power_up
 state

On 7/10/25 10:58 AM, Vivek.Pernamitta@...cinc.com wrote:
> From: Vivek Pernamitta <quic_vpernami@...cinc.com>
> 
> In mhi_sync_power_up() host waits for device to enter in to mission mode
> but SYS_ERR is an valid state, If device sends an SYS_ERR host will bail
> out for wait_event_timeout() as MHI is in error state and if MHI is tear
> downed sys err cant't be serviced and mhi can't be recovered.
> 
> If there is any SYS_ERR, sys_err handler needs to process SYS_ERR state
> and queues the next state transition for device to bring in to Mission
> mode, so mhi_sync_power_up() needs to wait for device to enter in to
> mission mode.

This is very difficult to read, please rephrase the commit message

Konrad