From: Alexander Shiyan <shc_work@mail.ru>
Date: Thu, 8 May 2014 07:56:37 +0000 (+0400)
Subject: w1: mxc_w1: Fix incorrect "presence" status
X-Git-Tag: firefly_0821_release~176^2~3493^2~87
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7cbcb136a7d703f1bd590979a3d07348fe1bc81d;p=firefly-linux-kernel-4.4.55.git

w1: mxc_w1: Fix incorrect "presence" status

W1 reset_bus() should return zero if slave device is present.
This patch fix this issue.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c
index 67b067a3e2ab..a5df5e89d456 100644
--- a/drivers/w1/masters/mxc_w1.c
+++ b/drivers/w1/masters/mxc_w1.c
@@ -66,7 +66,7 @@ static u8 mxc_w1_ds2_reset_bus(void *data)
 
 		udelay(100);
 	}
-	return !!(reg_val & MXC_W1_CONTROL_PST);
+	return !(reg_val & MXC_W1_CONTROL_PST);
 }
 
 /*