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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Tony Lindgren <tony@atomide.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 056/243] bus: ti-sysc: Fix getting optional clocks in clock_roles
Date:   Wed, 11 Dec 2019 16:03:38 +0100
Message-Id: <20191211150342.887027890@linuxfoundation.org>
In-Reply-To: <20191211150339.185439726@linuxfoundation.org>
References: <20191211150339.185439726@linuxfoundation.org>
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From: Tony Lindgren <tony@atomide.com>

[ Upstream commit 7b4f8ac2f1acdff3c0cce23d8c3b86434a6e768a ]

We can have holes in clock_roles with interface clock missing for
example. Currently getting an optional clock will fail if there are
only a functional clock and an optional clock.

Fixes: 09dfe5810762 ("bus: ti-sysc: Add handling for clkctrl opt clocks")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/bus/ti-sysc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 5b31131d0cba2..b6f63e7620214 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -217,8 +217,13 @@ static int sysc_get_clocks(struct sysc *ddata)
 	if (!ddata->clocks)
 		return -ENOMEM;
 
-	for (i = 0; i < ddata->nr_clocks; i++) {
-		error = sysc_get_one_clock(ddata, ddata->clock_roles[i]);
+	for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+		const char *name = ddata->clock_roles[i];
+
+		if (!name)
+			continue;
+
+		error = sysc_get_one_clock(ddata, name);
 		if (error && error != -ENOENT)
 			return error;
 	}
-- 
2.20.1