linux-kernel - Re: [PATCH v3] usb/hcd: Send a uevent signaling that the host controller had died

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Message-ID: <20190417202017.GA204974@google.com>
Date:   Wed, 17 Apr 2019 14:20:17 -0600
From:   Raul Rangel <rrangel@...omium.org>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     linux-usb@...r.kernel.org, groeck@...omium.org, oneukum@...e.com,
        djkurtz@...omium.org, zwisler@...omium.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Dmitry Torokhov <dtor@...omium.org>,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Raul Rangel <rrangel@...omium.org>
Subject: Re: [PATCH v3] usb/hcd: Send a uevent signaling that the host
 controller had died

On Wed, Apr 17, 2019 at 03:14:14PM -0400, Alan Stern wrote:
> On Wed, 17 Apr 2019, Raul E Rangel wrote:
> 
> > +/* Workqueue routine for when the root-hub has died. */
> > +static void hcd_died_work(struct work_struct *work)
> > +{
> > +	struct usb_hcd *hcd = container_of(work, struct usb_hcd, died_work);
> > +	char *env[] = {
> > +		"ERROR=DEAD",
> > +		NULL
> > +	};
> 
> This can now be
> 
> 	static const char *env[] = ...
> 
> right?  There's no need for the array to be reinitialized every time 
> the routine runs.
I originally tried to make it const, but kobject_uevent_env doesn't
declare the parameter as const, so the compiler yelled at me. I could
make it static, but a static without a const makes me wary. I can add it
if you think it's fine.
> 
> Alan Stern
>