From: Jarod Wilson <jwilson@redhat.com>
Date: Sat, 8 Mar 2008 18:18:58 +0000 (-0500)
Subject: firewire: use bitwise and to get reg in handle_registers
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=15f0d833f63da2fa49aed81480a37d5e896b5b9b;p=linux-beck.git

firewire: use bitwise and to get reg in handle_registers

for code efficiency.

Signed-off-by: Jarod Wilson <jwilson@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
---

diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 47bfe761250f..3682e75a09e1 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -797,7 +797,7 @@ handle_registers(struct fw_card *card, struct fw_request *request,
 		 unsigned long long offset,
 		 void *payload, size_t length, void *callback_data)
 {
-	int reg = offset - CSR_REGISTER_BASE;
+	int reg = offset & ~CSR_REGISTER_BASE;
 	unsigned long long bus_time;
 	__be32 *data = payload;