#include "itd1000.h"
#include "itd1000_priv.h"
+/* Max transfer size done by I2C transfer functions */
+#define MAX_XFER_SIZE 64
+
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
/* don't write more than one byte with flexcop behind */
static int itd1000_write_regs(struct itd1000_state *state, u8 reg, u8 v[], u8 len)
{
- u8 buf[1+len];
+ u8 buf[MAX_XFER_SIZE];
struct i2c_msg msg = {
.addr = state->cfg->i2c_address, .flags = 0, .buf = buf, .len = len+1
};
+
+ if (1 + len > sizeof(buf)) {
+ printk(KERN_WARNING
+ "itd1000: i2c wr reg=%04x: len=%d is too big!\n",
+ reg, len);
+ return -EINVAL;
+ }
+
buf[0] = reg;
memcpy(&buf[1], v, len);