lkml.org 
[lkml]   [2015]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/9] input: goodix: fix variable length array warning
On Thu, 28 May 2015 15:47:38 +0300
Irina Tirdea <irina.tirdea@intel.com> wrote:

> Fix sparse warning:
> drivers/input/touchscreen/goodix.c:182:26: warning:
> Variable length array is used.
>
> Replace the variable length array with fixed length.
>
> Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
> ---
> drivers/input/touchscreen/goodix.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
> index c2e785c..dac1b3c 100644
> --- a/drivers/input/touchscreen/goodix.c
> +++ b/drivers/input/touchscreen/goodix.c
> @@ -147,7 +147,7 @@ static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data)
> */
> static void goodix_process_events(struct goodix_ts_data *ts)
> {
> - u8 point_data[1 + GOODIX_CONTACT_SIZE * ts->max_touch_num];
> + u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];

Hi,

this fixes the warning from sparse, but also changes the semantics of
the code: ts->max_touch_num is less that GOODIX_MAX_CONTACTS for 5
touches devices and in this case we'll end up using more memory than is
necessary.

Thanks,
Antonio

> int touch_num;
> int i;
>
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-input" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html

--
Antonio Ospite
http://ao2.it

A: Because it messes up the order in which people normally read text.
See http://en.wikipedia.org/wiki/Posting_style
Q: Why is top-posting such a bad thing?


\
 
 \ /
  Last update: 2015-05-28 18:41    [W:0.187 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site