Re: [PATCH v1] Input: elants_i2c: Add Elan touchscreen support

From: Dmitry Torokhov
Date: Thu Nov 20 2014 - 12:47:19 EST


Hi Oliver,

On Thu, Nov 20, 2014 at 11:31:30AM +0100, Oliver Neukum wrote:
> > +static int elants_i2c_initialize(struct elants_data *ts)
> > +{
> > + struct i2c_client *client = ts->client;
> > + int error, retry_cnt;
> > + const u8 hello_packet[] = { 0x55, 0x55, 0x55, 0x55 };
> > + const u8 recov_packet[] = { 0x55, 0x55, 0x80, 0x80 };
> > + u8 buf[HEADER_SIZE];
> > +
>
> Strictly speaking you should disable preemption here.

Umm, why?

>
> > + for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) {
> > + error = elants_i2c_sw_reset(client);
> > + if (error) {
> > + /* Continue initializing if it's the last try
> > */
> > + if (retry_cnt < MAX_RETRIES - 1)
> > + continue;
> > + }

Thanks.

--
Dmitry
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