linux-kernel - [PATCH 3.13.y-ckt 126/143] clk-gate: fix bit # check in clk_register

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Message-Id: <1427831308-1854-127-git-send-email-kamal@canonical.com>
Date:	Tue, 31 Mar 2015 12:48:11 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Michael Turquette <mturquette@...aro.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 126/143] clk-gate: fix bit # check in clk_register_gate()

3.13.11-ckt18 -stable review patch.  If anyone has any objections, please let me know.

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

From: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>

commit 2e9dcdae4068460c45a308dd891be5248260251c upstream.

In case CLK_GATE_HIWORD_MASK flag is passed to clk_register_gate(), the bit #
should be no higher than 15, however the corresponding check is obviously off-
by-one.

Fixes: 045779942c04 ("clk: gate: add CLK_GATE_HIWORD_MASK")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Signed-off-by: Michael Turquette <mturquette@...aro.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/clk/clk-gate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c
index 4a58c55..797bab9 100644
--- a/drivers/clk/clk-gate.c
+++ b/drivers/clk/clk-gate.c
@@ -128,7 +128,7 @@ struct clk *clk_register_gate(struct device *dev, const char *name,
 	struct clk_init_data init;
 
 	if (clk_gate_flags & CLK_GATE_HIWORD_MASK) {
-		if (bit_idx > 16) {
+		if (bit_idx > 15) {
 			pr_err("gate bit exceeds LOWORD field\n");
 			return ERR_PTR(-EINVAL);
 		}
-- 
1.9.1

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