Re: [RFC 2/3] PM: Don't pass up device_resume() -EBUSY errors

[Muhammad Usama Anjum <usama.anjum@collabora.com>]

On 10/20/25 9:50 PM, Mario Limonciello (AMD) wrote:
> From: Mario Limonciello <mario.limonciello@amd.com>
> 
> If a device resume returns -EBUSY the device resume sequence has
> been skipped. Don't show errors for this or pass it up to async
> resume.  If resume is run again in another stage the device should
> try again.
> 
> Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
> Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Tested-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  drivers/base/power/main.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
> index bf9c3d79c455f..f6bc7ef9a8371 100644
> --- a/drivers/base/power/main.c
> +++ b/drivers/base/power/main.c
> @@ -1112,7 +1112,9 @@ static void device_resume(struct device *dev, pm_message_t state, bool async)
>  
>  	TRACE_RESUME(error);
>  
> -	if (error) {
> +	if (error == -EBUSY)
> +		pm_dev_dbg(dev, state, async ? " async" : "");
> +	else if (error) {
>  		WRITE_ONCE(async_error, error);
>  		dpm_save_failed_dev(dev_name(dev));
>  		pm_dev_err(dev, state, async ? " async" : "", error);


-- 
---
Thanks,
Usama