linux-kernel - [PATCH 4.19 020/106] clk: sprd: Dont reference clk_init

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Message-Id: <20191006171134.651188987@linuxfoundation.org>
Date:   Sun,  6 Oct 2019 19:20:26 +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, Chunyan Zhang <zhang.chunyan@...aro.org>,
        Baolin Wang <baolin.wang@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 020/106] clk: sprd: Dont reference clk_init_data after registration

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

[ Upstream commit f6c90df8e7e33c3dc33d4d7471bc42c232b0510e ]

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: Chunyan Zhang <zhang.chunyan@...aro.org>
Cc: Baolin Wang <baolin.wang@...aro.org>
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Link: https://lkml.kernel.org/r/20190731193517.237136-8-sboyd@kernel.org
Acked-by: Baolin Wang <baolin.wang@...aro.org>
Acked-by: Chunyan Zhang <zhang.chunyan@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/sprd/common.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
index e038b04472061..8bdab1c3013b8 100644
--- a/drivers/clk/sprd/common.c
+++ b/drivers/clk/sprd/common.c
@@ -71,16 +71,17 @@ int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw)
 	struct clk_hw *hw;
 
 	for (i = 0; i < clkhw->num; i++) {
+		const char *name;
 
 		hw = clkhw->hws[i];
-
 		if (!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