usb: ftdi-elan: remove a unnecessary variable 'empty_packets'

The variable 'empty_packets' does not used in any other places
except for self increment, so it can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index 76c718ac8c78d1189a91f33b778a3600cec1856b..b2b05c99e668ca9667ba6812b84e1d3ba710ece3 100644 (file)
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -915,7 +915,6 @@ static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
        int bytes_read = 0;
        int retry_on_empty = 1;
        int retry_on_timeout = 3;
-       int empty_packets = 0;
 read:{
                int packet_bytes = 0;
                int retval = usb_bulk_msg(ftdi->udev,
@@ -963,7 +962,6 @@ read:{
                } else if (packet_bytes == 2) {
                        unsigned char s0 = ftdi->bulk_in_buffer[0];
                        unsigned char s1 = ftdi->bulk_in_buffer[1];
-                       empty_packets += 1;
                        if (s0 == 0x31 && s1 == 0x60) {
                                if (retry_on_empty-- > 0) {
                                        goto more;