On 14-12-19 02:26 PM, Joe Perches wrote:
> On Fri, 2014-12-19 at 14:17 -0800, Jonathan Richardson wrote:
>> Add initial version of the Broadcom touchscreen driver.
>
> more trivia:
>
>> diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c
> []
>> +static int get_tsc_config(struct device_node *np, struct iproc_ts_priv *priv)
>> +{
>> + u32 val;
> []
>> + if (of_property_read_u32(np, "debounce_timeout", &val) >= 0) {
>> + if (val < 0 || val > 255) {
>> + dev_err(dev, "debounce_timeout must be [0-255]\n");
>> + return -EINVAL;
>> + }
>> + priv->cfg_params.debounce_timeout = val;
>
> Doesn't the compiler generate a warning message
> about an impossible "unsigned < 0" test for all
> of these "val < 0" uses?
>
Actually no it doesn't. The gcc output shows that neither -Wtype-limits
nor -Wextra are used to compile that file. I assume this is because
there would be just too many warnings.
>> + }
>> +
>> + if (of_property_read_u32(np, "settling_timeout", &val) >= 0) {
>> + if (val < 0 || val > 11) {
> []
>> + if (of_property_read_u32(np, "touch_timeout", &val) >= 0) {
>> + if (val < 0 || val > 255) {
> []
>> + if (of_property_read_u32(np, "average_data", &val) >= 0) {
>> + if (val < 0 || val > 8) {
> []
>> + if (of_property_read_u32(np, "fifo_threshold", &val) >= 0) {
>> + if (val < 0 || val > 31) {
>
>
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