Re: [PATCH] toshiba_acpi: Only register backlight device when interface is read/write

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On Thu, May 03, 2012 at 04:02:18PM -0500, Seth Forshee wrote:
> On Thu, May 03, 2012 at 09:32:57PM +0100, Matthew Garrett wrote:
> > Merged for -next, thanks. I fixed up the conflicts with the the 
> > transflective display patch, but someone should probably verify them.
> 
> At a glance I see a couple of obvious mistakes, one of which will fail
> to build.
> 
> >  static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
> >  {
> >  	u32 hci_result;
> >  	u32 value;
> > +	int brightness;
> 
> brightness needs to be initialized to 0. As-is it should generate a
> warning about using an uninitialized variable.
> 
> >  static const struct backlight_ops toshiba_backlight_data = {
> > +	.iotns = BL_CORE_SUSPENDRESUME,
> 
> Should be options.

Also:

+       
+       /* Determine whether or not BIOS supports transflective backlight */
+       ret = get_tr_backlight_status(dev, &enabled);
+       dev->tr_backlight_supported = !ret;

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