Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Jerome Brunet <jbrunet@baylibre.com>,
        Stephen Boyd <sboyd@codeaurora.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.9 190/293] clk: scpi: error when clock fails to
 register
Thread-Topic: [PATCH AUTOSEL for 4.9 190/293] clk: scpi: error when clock
 fails to register
Thread-Index: AQHTz5k/y3OZZQ4X9Um+K//G7zkN7Q==
Date:   Mon, 9 Apr 2018 00:25:23 +0000
Message-ID: <20180409002239.163177-190-alexander.levin@microsoft.com>
References: <20180409002239.163177-1-alexander.levin@microsoft.com>
In-Reply-To: <20180409002239.163177-1-alexander.levin@microsoft.com>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: microsoft.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 399294e3-ae9c-46bc-0f3a-08d59db14f0d
X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:25:23.0346
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1126
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: Jerome Brunet <jbrunet@baylibre.com>

[ Upstream commit 2b286b09a048df80fd5f7dfc5057c2837679a1ab ]

Current implementation of scpi_clk_add just print a warning when clock
fails to register but then keep going as if nothing happened. The
provider is then registered with bogus data.

This may latter lead to an Oops in __clk_create_clk when
hlist_add_head(&clk->clks_node, &hw->core->clks) is called.

This patch fixes the issue and errors if a clock fails to register.

Fixes: cd52c2a4b5c4 ("clk: add support for clocks provided by SCP(System Co=
ntrol Processor)")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/clk/clk-scpi.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/clk-scpi.c b/drivers/clk/clk-scpi.c
index 96d37175d0ad..e44b5ca91fed 100644
--- a/drivers/clk/clk-scpi.c
+++ b/drivers/clk/clk-scpi.c
@@ -245,10 +245,12 @@ static int scpi_clk_add(struct device *dev, struct de=
vice_node *np,
 		sclk->id =3D val;
=20
 		err =3D scpi_clk_ops_init(dev, match, sclk, name);
-		if (err)
+		if (err) {
 			dev_err(dev, "failed to register clock '%s'\n", name);
-		else
-			dev_dbg(dev, "Registered clock '%s'\n", name);
+			return err;
+		}
+
+		dev_dbg(dev, "Registered clock '%s'\n", name);
 		clk_data->clk[idx] =3D sclk;
 	}
=20
--=20
2.15.1