[PATCH] w1: fix CRC calculation on bigendian platforms.
From: Greg KH
Date: Mon Jul 11 2005 - 17:12:24 EST
[PATCH] w1: fix CRC calculation on bigendian platforms.
In the 2.6.13-rc1 code the "rn" structure is in the wrong-endianness
when passed to w1_attach_slave_device(). This causes problems like the
family and crc being swapped around.
Signed-off-by: Roger Blofeld <blofeldus@xxxxxxxxx>
Signed-off-by: Evgeniy Polyakov <johnpol@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
commit 0e65f82814e9828d3ff54988de9e7c0b36794daa
tree a4d5dfb9ab550160a453c6266fe67d18ace76857
parent 80efa8c72006a1c04004f8fb07b22073348e4bf2
author Evgeniy Polyakov <johnpol@xxxxxxxxxxx> Thu, 30 Jun 2005 22:52:38 +0400
committer Greg Kroah-Hartman <gregkh@xxxxxxx> Mon, 11 Jul 2005 14:10:37 -0700
drivers/w1/w1.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -516,6 +516,7 @@ static void w1_slave_found(unsigned long
struct w1_reg_num *tmp;
int family_found = 0;
struct w1_master *dev;
+ u64 rn_le = cpu_to_le64(rn);
dev = w1_search_master(data);
if (!dev) {
@@ -544,10 +545,8 @@ static void w1_slave_found(unsigned long
slave_count++;
}
- rn = cpu_to_le64(rn);
-
if (slave_count == dev->slave_count &&
- rn && ((le64_to_cpu(rn) >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn, 7)) {
+ rn && ((rn >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn_le, 7)) {
w1_attach_slave_device(dev, tmp);
}
-
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