linux-kernel - [PATCH for 4.9 20/59] reset: ti_syscon: fix a ti_syscon_reset

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Date:   Thu, 14 Sep 2017 15:51:11 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Jiancheng Xue <xuejiancheng@...ilicon.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH for 4.9 20/59] reset: ti_syscon: fix a ti_syscon_reset_status
 issue

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>
---
 drivers/reset/reset-ti-syscon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c
index 47f0ffd3b013..1799fd423901 100644
--- 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 reset_controller_dev *rcdev,
 	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 = {
-- 
2.11.0