From: Perceval Anichini <perceval.anichini@streamvision.fr>
Date: Wed, 9 Nov 2005 05:35:23 +0000 (-0800)
Subject: [PATCH] dvb: dst: remove redundant checksum calculation
X-Git-Tag: firefly_0821_release~40467
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4fbbc7ee591ab19707d12e2f86a1ae11f7195423;p=firefly-linux-kernel-4.4.55.git

[PATCH] dvb: dst: remove redundant checksum calculation

removes the redundant checksum calculation, which was also exported from the
dst.c module

Signed-off-by: Perceval Anichini <perceval.anichini@streamvision.fr>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Cc: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/media/dvb/bt8xx/dst_ca.c b/drivers/media/dvb/bt8xx/dst_ca.c
index f77fda77b638..16645e06dea2 100644
--- a/drivers/media/dvb/bt8xx/dst_ca.c
+++ b/drivers/media/dvb/bt8xx/dst_ca.c
@@ -69,26 +69,12 @@ static int ca_set_pid(void)
 }
 
 
-static int put_checksum(u8 *check_string, int length)
+static void put_checksum(u8 *check_string, int length)
 {
-	u8 i = 0, checksum = 0;
-
-	dprintk(verbose, DST_CA_DEBUG, 1, " ========================= Checksum calculation ===========================");
-	dprintk(verbose, DST_CA_DEBUG, 1, " String Length=[0x%02x]", length);
-	dprintk(verbose, DST_CA_DEBUG, 1, " String=[");
-
-	while (i < length) {
-		dprintk(verbose, DST_CA_DEBUG, 0, " %02x", check_string[i]);
-		checksum += check_string[i];
-		i++;
-	}
-	dprintk(verbose, DST_CA_DEBUG, 0, " ]\n");
-	dprintk(verbose, DST_CA_DEBUG, 1, "Sum=[%02x]\n", checksum);
-	check_string[length] = ~checksum + 1;
-	dprintk(verbose, DST_CA_DEBUG, 1, " Checksum=[%02x]", check_string[length]);
-	dprintk(verbose, DST_CA_DEBUG, 1, " ==========================================================================");
-
-	return 0;
+	dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
+	dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
+	check_string[length] = dst_check_sum (check_string, length);
+	dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
 }
 
 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)