linux-kernel - RE: [PATCH v3] staging: ste_rmi4: Convert to Type-B support

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Date:	Mon, 12 Nov 2012 11:59:26 +0000
From:	Alexandra Chin <alexandra.chin@...synaptics.com>
To:	Henrik Rydberg <rydberg@...omail.se>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux Input <linux-input@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>,
	Mahesh Srinivasan <msrinivasan@...aptics.com>,
	Alex Chang <alex.chang@...synaptics.com>,
	Scott Lin <scott.lin@...synaptics.com>,
	Christopher Heiny <Cheiny@...aptics.com>
Subject: RE: [PATCH v3] staging: ste_rmi4: Convert to Type-B support

Hi Henrik,

Really thanks a lot for all your advice.

> > @@ -751,7 +739,7 @@ static int synaptics_rmi4_i2c_query_device(struct
> synaptics_rmi4_data *pdata)
> >  				pdata->fn01_data_base_addr =
> >  						rmi_fd.data_base_addr;
> >  				break;
> > -			case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM:
> > +			case SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM:
> >  				if (rmi_fd.intr_src_count) {
> >  					rfi = kmalloc(sizeof(*rfi),
> >  								GFP_KERNEL);
> > @@ -761,7 +749,8 @@ static int synaptics_rmi4_i2c_query_device(struct
> synaptics_rmi4_data *pdata)
> >  								__func__);
> >  							return -ENOMEM;
> >  					}
> > -					retval = synpatics_rmi4_touchpad_detect
> > +					retval =
> > +					synpatics_rmi4_touchscreen_detect
> >  								(pdata,	rfi,
> >  								&rmi_fd,
> >  								intr_count);
> 
> Odd line break is a clear sign that something could be broken out into its own
> function.
> 
> > @@ -854,8 +843,9 @@ static int synaptics_rmi4_i2c_query_device(struct
> synaptics_rmi4_data *pdata)
> >  		list_for_each_entry(rfi, &rmi->support_fn_list, link) {
> >  			if (rfi->num_of_data_sources) {
> >  				if (rfi->fn_number ==
> > -					SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) {
> > -					retval = synaptics_rmi4_touchpad_config
> > +					SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM) {
> > +					retval =
> > +					synaptics_rmi4_touchscreen_config
> >  								(pdata, rfi);
> >  					if (retval < 0)
> >  						return retval;
> 
> Same here.
> 

As you mentioned, there are odd lines in patch v3.
These odd lines are because that lines are over 80 characters after "touchpad" is
replaced by "touchscreen".

In patch v4, I did the splitting of the functions to fix line over 80 characters issue
(and other irrelevant work).

Somehow I realized that code itself can be optimized, and there is no need
to break out function to fix line over 80 characters issues. Therefore I rollback
patch to v3, and reorganized code flow to fix line over 80 characters issues in
patch v5. Patch v5 only includes odd lines issue fixed, although it looks a little
too large.

And these changes have been verified with Pandaboard.

Greatly appreciate your suggestions, and please let me know if you have any
concerns about v5 (https://lkml.org/lkml/2012/11/8/31).

Yours very truly,
Alexandra
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