linux-kernel - [PATCH 4.19 018/106] clk: actions: Dont reference clk_init

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Message-Id: <20191006171132.803572044@linuxfoundation.org>
Date:   Sun,  6 Oct 2019 19:20:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 018/106] clk: actions: Dont reference clk_init_data after registration

From: Stephen Boyd <sboyd@...nel.org>

[ Upstream commit cf9ec1fc6d7cceb73e7f1efd079d2eae173fdf57 ]

A future patch is going to change semantics of clk_register() so that
clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
referencing this member here so that we don't run into NULL pointer
exceptions.

Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Link: https://lkml.kernel.org/r/20190731193517.237136-2-sboyd@kernel.org
[sboyd@...nel.org: Move name to after checking for error or NULL hw]
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/actions/owl-common.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/actions/owl-common.c b/drivers/clk/actions/owl-common.c
index 61c1071b5180a..e9be34b17f3f5 100644
--- a/drivers/clk/actions/owl-common.c
+++ b/drivers/clk/actions/owl-common.c
@@ -67,16 +67,17 @@ int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks)
 	struct clk_hw *hw;
 
 	for (i = 0; i < hw_clks->num; i++) {
+		const char *name;
 
 		hw = hw_clks->hws[i];
-
 		if (IS_ERR_OR_NULL(hw))
 			continue;
 
+		name = hw->init->name;
 		ret = devm_clk_hw_register(dev, hw);
 		if (ret) {
 			dev_err(dev, "Couldn't register clock %d - %s\n",
-				i, hw->init->name);
+				i, name);
 			return ret;
 		}
 	}
-- 
2.20.1