linux-kernel - [PATCH 4.2.y-ckt 155/218] clk: xgene: Add missing parenthesis when clearing divider value

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Message-Id: <1459455431-12687-156-git-send-email-kamal@canonical.com>
Date:	Thu, 31 Mar 2016 13:16:08 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Loc Ho <lho@....com>, Stephen Boyd <sboyd@...eaurora.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 155/218] clk: xgene: Add missing parenthesis when clearing divider value

4.2.8-ckt7 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Loc Ho <lho@....com>

commit 0f4c7a138dfefb0ebdbaf56e3ba2acd2958a6605 upstream.

In the initial fix for non-zero divider shift value, the parenthesis
was missing after the negate operation. This patch adds the required
parenthesis. Otherwise, lower bits may be cleared unintentionally.

Signed-off-by: Loc Ho <lho@....com>
Acked-by: Toan Le <toanle@....com>
Fixes: 1382ea631ddd ("clk: xgene: Fix divider with non-zero shift value")
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/clk/clk-xgene.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c
index 2f9668b..3bea500 100644
--- a/drivers/clk/clk-xgene.c
+++ b/drivers/clk/clk-xgene.c
@@ -353,8 +353,8 @@ static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate,
 		/* Set new divider */
 		data = xgene_clk_read(pclk->param.divider_reg +
 				pclk->param.reg_divider_offset);
-		data &= ~((1 << pclk->param.reg_divider_width) - 1)
-				<< pclk->param.reg_divider_shift;
+		data &= ~(((1 << pclk->param.reg_divider_width) - 1)
+				<< pclk->param.reg_divider_shift);
 		data |= divider;
 		xgene_clk_write(data, pclk->param.divider_reg +
 					pclk->param.reg_divider_offset);
-- 
2.7.4