diff options
| author | Luis Ortega <luiorpe1@upv.es> | 2014-01-27 12:28:33 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-01-27 22:35:17 -0800 |
| commit | d333b6062f1414622d1fe37314fa2ec9e3df402d (patch) | |
| tree | 9a34bd475dcf6b414dcb182cc9d2bf14ddc391f3 /drivers/input/touchscreen/zforce_ts.c | |
| parent | 5aee41a60c4d53f65918c1ec0ab94c245f2c08af (diff) | |
Input: zforce - reduce stack memory allocated to frames
A frame is a u8 array with the following structure:
[PAYLOAD_HEADER, PAYLOAD_LENGTH, ...PAYLOAD_BODY...]
PAYLOAD_BODY can be at most 255 bytes long, as it's size is represented
by PAYLOAD_LENGTH. Therefore we can reduce the stack memory allocated to
payload_buffer[] roughly by half, from 512 to 257 bytes.
Signed-off-by: Luis Ortega <luiorpe1@upv.es>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl)
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/zforce_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/zforce_ts.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c index 3ed024985a58..307f582eeabf 100644 --- a/drivers/input/touchscreen/zforce_ts.c +++ b/drivers/input/touchscreen/zforce_ts.c @@ -33,6 +33,7 @@ #define WAIT_TIMEOUT msecs_to_jiffies(1000) #define FRAME_START 0xee +#define FRAME_MAXSIZE 257 /* Offsets of the different parts of the payload the controller sends */ #define PAYLOAD_HEADER 0 @@ -464,7 +465,7 @@ static irqreturn_t zforce_interrupt(int irq, void *dev_id) struct i2c_client *client = ts->client; const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); int ret; - u8 payload_buffer[512]; + u8 payload_buffer[FRAME_MAXSIZE]; u8 *payload; /* |