From: johnpol@2ka.mipt.ru <johnpol@2ka.mipt.ru>
Date: Tue, 19 Apr 2005 04:16:57 +0000 (-0700)
Subject: [PATCH] w1: real fix for big endian machines.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8523ff45672a5c9209ab7459142e37e7cd393e6c;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] w1: real fix for big endian machines.

Real fix for big endian machines - crc must be calculated
using little endian byte order.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index fd630cec0e79..8d7821899cc1 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -522,10 +522,11 @@ void w1_slave_found(unsigned long data, u64 rn)
 		slave_count++;
 	}
 
-		if (slave_count == dev->slave_count && rn ) {
-			tmp = cpu_to_le64(rn);
-			if(((rn >> 56) & 0xff) == w1_calc_crc8((u8 *)&tmp, 7))
-				w1_attach_slave_device(dev, (struct w1_reg_num *) &rn);
+	rn = cpu_to_le64(rn);
+
+	if (slave_count == dev->slave_count &&
+		rn && ((le64_to_cpu(rn) >> 56) & 0xff) == w1_calc_crc8((u8 *)&rn, 7)) {
+		w1_attach_slave_device(dev, tmp);
 	}
 			
 	atomic_dec(&dev->refcnt);