linux-kernel - [PATCH] usb: misc: ftdi-elan: fix duplicated code for different branches

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Date:   Sat, 12 Aug 2017 20:12:32 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] usb: misc: ftdi-elan: fix duplicated code for different
 branches

Refactor code in order to avoid identical code for different branches.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/usb/misc/ftdi-elan.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index c45904f..424ff12 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -857,7 +857,7 @@ static char *have_ed_set_response(struct usb_ftdi *ftdi,
 	target->actual = 0;
 	target->non_null = (ed_length >> 15) & 0x0001;
 	target->repeat_number = (ed_length >> 11) & 0x000F;
-	if (ed_type == 0x02) {
+	if (ed_type == 0x02 || ed_type == 0x03) {
 		if (payload == 0 || target->abandoning > 0) {
 			target->abandoning = 0;
 			mutex_unlock(&ftdi->u132_lock);
@@ -873,31 +873,6 @@ static char *have_ed_set_response(struct usb_ftdi *ftdi,
 			mutex_unlock(&ftdi->u132_lock);
 			return b;
 		}
-	} else if (ed_type == 0x03) {
-		if (payload == 0 || target->abandoning > 0) {
-			target->abandoning = 0;
-			mutex_unlock(&ftdi->u132_lock);
-			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
-					      payload);
-			ftdi->received = 0;
-			ftdi->expected = 4;
-			ftdi->ed_found = 0;
-			return ftdi->response;
-		} else {
-			ftdi->expected = 4 + payload;
-			ftdi->ed_found = 1;
-			mutex_unlock(&ftdi->u132_lock);
-			return b;
-		}
-	} else if (ed_type == 0x01) {
-		target->abandoning = 0;
-		mutex_unlock(&ftdi->u132_lock);
-		ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
-				      payload);
-		ftdi->received = 0;
-		ftdi->expected = 4;
-		ftdi->ed_found = 0;
-		return ftdi->response;
 	} else {
 		target->abandoning = 0;
 		mutex_unlock(&ftdi->u132_lock);
-- 
2.5.0