linux-kernel - RE: [v3 1/3] 1/3 Touchscreen: Cypress TTSP G3 MTDEV Core Driver

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Date:	Tue, 4 Jan 2011 16:38:31 -0800
From:	"Kevin McNeely" <Kevin.McNeely@...ress.com>
To:	"Hong Liu" <hong.liu@...el.com>
Cc:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>,
	"David Brown" <davidb@...eaurora.org>,
	"Trilok Soni" <tsoni@...eaurora.org>,
	"Henrik Rydberg" <rydberg@...omail.se>,
	"Samuel Ortiz" <sameo@...ux.intel.com>,
	"Eric Miao" <eric.y.miao@...il.com>,
	"Mike Frysinger" <vapier@...too.org>,
	"Alan Cox" <alan@...ux.intel.com>, <linux-input@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: [v3 1/3] 1/3 Touchscreen: Cypress TTSP G3 MTDEV Core Driver

Hello Hong,

The uninitialized use of ts->dev will be fixed in v4.

Thank you,
Kevin


> -----Original Message-----
> From: Hong Liu [mailto:hong.liu@...el.com]
> Sent: Monday, January 03, 2011 5:50 PM
> To: Kevin McNeely
> Cc: Dmitry Torokhov; David Brown; Trilok Soni; Henrik Rydberg; Samuel
> Ortiz; Eric Miao; Mike Frysinger; Alan Cox; linux-
> input@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [v3 1/3] 1/3 Touchscreen: Cypress TTSP G3 MTDEV Core
> Driver
> 
> On Thu, 2010-12-30 at 03:17 +0800, Kevin McNeely wrote:
> [...]
> 
> > +
> > +void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device
> *dev)
> > +{
> > +       struct input_dev *input_device;
> > +
> > +       struct cyttsp *ts = kzalloc(sizeof(*ts), GFP_KERNEL);
> > +
> > +       if (!ts) {
> > +               dev_dbg(ts->dev, "%s: Error, kzalloc\n", __func__);
> > +               goto error_alloc_data;
> > +       }
> 
> ts->dev is not assigned yet.
> 
> Thanks,
> Hong
> 
> > +
> > +       if (dev == NULL || bus_ops == NULL) {
> > +               kfree(ts);
> > +               goto error_alloc_data;
> > +       }
> > +
> > +       mutex_init(&ts->mutex);
> > +       ts->dev = dev;
> > +       ts->platform_data = dev->platform_data;
> > +       ts->bus_ops = bus_ops;
> > +       init_completion(&ts->bl_ready);
> > +
> > +       if (ts->platform_data->init) {
> > +               if (ts->platform_data->init()) {
> > +                       dev_dbg(ts->dev, "%s: Error, platform init
> failed!\n",
> > +                               __func__);
> > +                       goto error_init;
> > +               }
> > +       }
> > +
> > +       ts->irq = gpio_to_irq(ts->platform_data->irq_gpio);
> > +       if (ts->irq <= 0) {
> > +               dev_dbg(ts->dev, "%s: Error, failed to allocate
> irq\n",
> > +                       __func__);
> > +                       goto error_init;
> > +       }
> > +
> > +       /* Create the input device and register it. */
> > +       input_device = input_allocate_device();
> > +       if (!input_device) {
> > +               dev_dbg(ts->dev, "%s: Error, failed to allocate input
> device\n",
> > +                       __func__);
> > +               goto error_input_allocate_device;
> > +       }
> > +
> > +       ts->input = input_device;
> > +       input_device->name = ts->platform_data->name;
> > +       snprintf(ts->phys, sizeof(ts->phys), "%s", dev_name(dev));
> > +       input_device->phys = ts->phys;
> > +       input_device->dev.parent = ts->dev;
> > +       ts->bus_type = bus_ops->dev->bus;
> > +       input_device->open = cyttsp_open;
> > +       input_device->close = cyttsp_close;
> > +       input_set_drvdata(input_device, ts);
> > +
> > +       __set_bit(EV_SYN, input_device->evbit);
> > +       __set_bit(EV_KEY, input_device->evbit);
> > +       __set_bit(EV_ABS, input_device->evbit);
> > +
> > +       input_set_abs_params(input_device, ABS_MT_POSITION_X,
> > +               0, ts->platform_data->maxx, 0, 0);
> > +       input_set_abs_params(input_device, ABS_MT_POSITION_Y,
> > +               0, ts->platform_data->maxy, 0, 0);
> > +       input_set_abs_params(input_device, ABS_MT_TOUCH_MAJOR,
> > +               0, CY_MAXZ, 0, 0);
> > +
> > +       if (input_register_device(input_device)) {
> > +               dev_dbg(ts->dev, "%s: Error, failed to register input
> device\n",
> > +                       __func__);
> > +               goto error_input_register_device;
> > +       }
> > +
> > +       goto no_error;
> > +
> > +error_input_register_device:
> > +       input_unregister_device(input_device);
> > +error_input_allocate_device:
> > +       if (ts->platform_data->exit)
> > +               ts->platform_data->exit();
> > +error_init:
> > +       mutex_destroy(&ts->mutex);
> > +       kfree(ts);
> > +error_alloc_data:
> > +no_error:
> > +       return ts;
> > +}
> > +EXPORT_SYMBOL_GPL(cyttsp_core_init);
> > +
> > +MODULE_LICENSE("GPL");
> > +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver
> core");
> > +MODULE_AUTHOR("Cypress");
> 


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