Input: pixcir_i2c_ts - fix receive error

commit 469d7d22cea146e40efe8c330e5164b4d8f13934 upstream.

The i2c_master_recv() uses readsize to receive data from i2c but compares
to size of rdbuf which is always 27. This would cause problem when the
max_fingers is not 5. Change the comparison value to readsize instead.

Fixes: 36874c7e219 ("Input: pixcir_i2c_ts - support up to 5 fingers and
hardware tracking IDs:)

Signed-off-by: Frodo Lai <frodo_lai@bcmcom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c
index 2c21071..8f3e243 100644 (file)
--- a/drivers/input/touchscreen/pixcir_i2c_ts.c
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -78,7 +78,7 @@ static void pixcir_ts_parse(struct pixcir_i2c_ts_data *tsdata,
        }
 
        ret = i2c_master_recv(tsdata->client, rdbuf, readsize);
-       if (ret != sizeof(rdbuf)) {
+       if (ret != readsize) {
                dev_err(&tsdata->client->dev,
                        "%s: i2c_master_recv failed(), ret=%d\n",
                        __func__, ret);