Cleanup response_size in ni6501_send_command (READ_PORT command).
No logical/functional change is introduced by this patch.

Signed-off-by: Luca Ellero <luca.ell...@brickedbrain.com>
---
 drivers/staging/comedi/drivers/ni_usb6501.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_usb6501.c 
b/drivers/staging/comedi/drivers/ni_usb6501.c
index c99b693..91c0e22 100644
--- a/drivers/staging/comedi/drivers/ni_usb6501.c
+++ b/drivers/staging/comedi/drivers/ni_usb6501.c
@@ -193,8 +193,7 @@ static int ni6501_send_command(struct comedi_device *dev, 
int command,
        case READ_PORT:
 
                request_size = sizeof(READ_PORT_REQUEST);
-                /* 4 additional bytes for READ_PORT request */
-               response_size = sizeof(GENERIC_RESPONSE) + 4;
+               response_size = sizeof(READ_PORT_RESPONSE);
 
                memcpy(tx, READ_PORT_REQUEST, request_size);
 
-- 
1.7.10.4

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