[PATCH] w1: fix CRC calculation on bigendian platforms.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[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 <[email protected]>
Signed-off-by: Evgeniy Polyakov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
commit 0e65f82814e9828d3ff54988de9e7c0b36794daa
tree a4d5dfb9ab550160a453c6266fe67d18ace76857
parent 80efa8c72006a1c04004f8fb07b22073348e4bf2
author Evgeniy Polyakov <[email protected]> Thu, 30 Jun 2005 22:52:38 +0400
committer Greg Kroah-Hartman <[email protected]> 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);
 	}
 

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]
  Powered by Linux