HID: ft260: fix a NULL pointer dereference in ft260_i2c_write

[linux-2.6-microblaze.git] / drivers / hid / hid-ft260.c

diff --git a/drivers/hid/hid-ft260.c b/drivers/hid/hid-ft260.c
index ac13398..b4f180c 100644 (file)
--- a/drivers/hid/hid-ft260.c
+++ b/drivers/hid/hid-ft260.c
@@ -409,6 +409,9 @@ static int ft260_i2c_write(struct ft260_device *dev, u8 addr, u8 *data,
        struct ft260_i2c_write_request_report *rep =
                (struct ft260_i2c_write_request_report *)dev->write_buf;
 
+       if (len < 1)
+               return -EINVAL;
+
        rep->flag = FT260_FLAG_START;
 
        do {