linux-kernel - Re: [PATCH] rtl8192cu: Fix WARNING on suspend/resume

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Message-ID: <CALSq=BaJSURcKU8RkCxxG=Mht4y04dVefKMESuHmiEdhwzc2Eg@mail.gmail.com>
Date:	Wed, 4 Jan 2012 08:16:29 -0800
From:	Daniel Halperin <dhalperi@...washington.edu>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	John W Linville <linville@...driver.com>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	chaoming_li@...lsil.com.cn, linux-wireless@...r.kernel.org
Subject: Re: [PATCH] rtl8192cu: Fix WARNING on suspend/resume

Sorry, Larry, I didn't see this til it was included in John's mail this morning.

On Tue, Jan 3, 2012 at 10:39 AM, Larry Finger <Larry.Finger@...inger.net> wrote:
>
> +#ifdef CONFIG_PM
> +static int rtl8192cu_usb_suspend(struct usb_interface *pusb_intf,
> +                                pm_message_t message)
> +{
> +       /* Increase usage_count to Save loaded fw across suspend/resume */
> +       atomic_inc(&usage_count);
> +       return 0;
> +}
> +
> +static int rtl8192cu_usb_resume(struct usb_interface *pusb_intf)
> +{
> +       atomic_dec(&usage_count);       /* after resume, decrease usage count */
> +       return 0;
> +}
> +#endif

Based on the warning-fix I submitted yesterday, this probably produces
a warning if CONFIG_PM is set but not CONFIG_PM_SLEEP. My patch was
for an ethernet driver, but iwlwifi and ath5k appear to follow the
same pattern using CONFIG_PM_SLEEP instead of the above.

See: http://www.spinics.net/lists/netdev/msg184717.html for the patch
and http://www.spinics.net/lists/netdev/msg184715.html for the
discussion.

Dan
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