linux-kernel - Re: [PATCH] Revert "firmware: qcom_scm: Clear download bit during reboot"

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Date:   Fri, 19 May 2023 19:12:01 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Mukesh Ojha <quic_mojha@...cinc.com>
Cc:     agross@...nel.org, konrad.dybcio@...aro.org,
        p.zabel@...gutronix.de, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "firmware: qcom_scm: Clear download bit during
 reboot"

On Thu, May 18, 2023 at 04:50:23PM +0530, Mukesh Ojha wrote:
> This reverts commit 781d32d1c970 as it causes regression(reboot
> does not work) for target like IPQ4019 that does not support
> download mode scm calls end to end.
> 

What do you mean with "reboot does not work"?

Does qcom_scm_set_download_mode() crash the board? Does the reboot
always end up in download mode? Or some other form of "not work"?

Regards,
Bjorn

> Fixes: 781d32d1c970 ("firmware: qcom_scm: Clear download bit during reboot")
> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> ---
>  drivers/firmware/qcom_scm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index fde33acd46b7..a4bb9265d9c0 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -1508,7 +1508,8 @@ static int qcom_scm_probe(struct platform_device *pdev)
>  static void qcom_scm_shutdown(struct platform_device *pdev)
>  {
>  	/* Clean shutdown, disable download mode to allow normal restart */
> -	qcom_scm_set_download_mode(false);
> +	if (download_mode)
> +		qcom_scm_set_download_mode(false);
>  }
>  
>  static const struct of_device_id qcom_scm_dt_match[] = {
> -- 
> 2.7.4
>