linux-kernel - [PATCH 4.9 019/104] reset: ti_syscon: fix a ti_syscon_reset

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Message-Id: <20171006083843.590733683@linuxfoundation.org>
Date:   Fri,  6 Oct 2017 10:50:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiancheng Xue <xuejiancheng@...ilicon.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 019/104] reset: ti_syscon: fix a ti_syscon_reset_status issue

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jiancheng Xue <xuejiancheng@...ilicon.com>


[ Upstream commit 5987b4bf512101137fa60c5c0ccac3db51541221 ]

If STATUS_SET was not set, ti_syscon_reset_status would always return 0
no matter whether the status_bit was set or not.

Signed-off-by: Jiancheng Xue <xuejiancheng@...ilicon.com>
Fixes: cc7c2bb1493c ("reset: add TI SYSCON based reset driver")
Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/reset/reset-ti-syscon.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/reset/reset-ti-syscon.c
+++ b/drivers/reset/reset-ti-syscon.c
@@ -154,8 +154,8 @@ static int ti_syscon_reset_status(struct
 	if (ret)
 		return ret;
 
-	return (reset_state & BIT(control->status_bit)) &&
-			(control->flags & STATUS_SET);
+	return !(reset_state & BIT(control->status_bit)) ==
+		!(control->flags & STATUS_SET);
 }
 
 static struct reset_control_ops ti_syscon_reset_ops = {