linux-kernel - Re: [PATCH v1] pwm: dwc: allow suspend/resume for 16 channels

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Date: Fri, 12 Apr 2024 18:35:51 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Raag Jadav <raag.jadav@...el.com>
Cc: u.kleine-koenig@...gutronix.de, jarkko.nikula@...ux.intel.com,
	mika.westerberg@...ux.intel.com, linux-pwm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] pwm: dwc: allow suspend/resume for 16 channels

On Fri, Apr 12, 2024 at 11:38:12AM +0530, Raag Jadav wrote:
> With 16 channel pwm support, we're registering two instances of pwm_chip
> with 8 channels each. We need to update PM functions to use both instances
> of pwm_chip during power state transitions.
> 
> Introduce struct dwc_pwm_drvdata and use it as driver_data, which will
> maintain both instances of pwm_chip along with dwc_pwm_info and allow us
> to use them inside suspend/resume handles.

..

> +	data = devm_kzalloc(dev, struct_size(data, chips, info->nr), GFP_KERNEL);
> +	if (!data)
> +		return dev_err_probe(dev, -ENOMEM, "Failed to allocate drvdata\n");

Haven't noticed before, but we do not print messages for -ENOMEM. Just return
the code.

-- 
With Best Regards,
Andy Shevchenko