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Commit d333b606 authored by Luis Ortega's avatar Luis Ortega Committed by Dmitry Torokhov
Browse files

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: default avatarLuis Ortega <luiorpe1@upv.es>
Acked-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl)
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 5aee41a6

drivers/input/touchscreen/zforce_ts.c

+2 −1
Original line number Diff line number Diff line
@@ -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;



	/*