From: Ansuel Smith <ansuelsmth@gmail.com>
To: Rob Herring <robh+dt@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Andy Gross <agross@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Ansuel Smith <ansuelsmth@gmail.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org
Subject: [PATCH v5 07/18] clk: qcom: clk-krait: add hw_parent check for div2_round_rate
Date: Mon, 21 Mar 2022 16:38:44 +0100 [thread overview]
Message-ID: <20220321153855.12082-8-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20220321153855.12082-1-ansuelsmth@gmail.com>
Check if hw_parent is present before calculating the round_rate to
prevent kernel panic. On error -EINVAL is reported.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/clk/qcom/clk-krait.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/qcom/clk-krait.c b/drivers/clk/qcom/clk-krait.c
index e447fcc3806d..b6b7650dbf15 100644
--- a/drivers/clk/qcom/clk-krait.c
+++ b/drivers/clk/qcom/clk-krait.c
@@ -80,7 +80,12 @@ EXPORT_SYMBOL_GPL(krait_mux_clk_ops);
static long krait_div2_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
- *parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw), rate * 2);
+ struct clk_hw *hw_parent = clk_hw_get_parent(hw);
+
+ if (!hw_parent)
+ return -EINVAL;
+
+ *parent_rate = clk_hw_round_rate(hw_parent, rate * 2);
return DIV_ROUND_UP(*parent_rate, 2);
}
--
2.34.1
next prev parent reply other threads:[~2022-03-21 16:08 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-21 15:38 [PATCH v5 00/18] Modernize rest of the krait drivers Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 01/18] clk: introduce clk_hw_get_index_of_parent new API Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 02/18] clk: qcom: gcc-ipq806x: skip pxo/cxo fixed clk if already present Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 03/18] clk: qcom: gcc-ipq806x: add PXO_SRC in clk table Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 04/18] clk: qcom: clk-hfpll: use poll_timeout macro Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 05/18] clk: qcom: kpss-xcc: convert to parent data API Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 06/18] clk: qcom: clk-krait: unlock spin after mux completion Ansuel Smith
2022-03-21 15:38 ` Ansuel Smith [this message]
2022-03-21 15:38 ` [PATCH v5 08/18] clk: qcom: krait-cc: convert to parent_data API Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 09/18] clk: qcom: krait-cc: drop pr_info and register qsb only if needed Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 10/18] clk: qcom: krait-cc: drop hardcoded safe_sel Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 11/18] clk: qcom: krait-cc: force sec_mux to QSB Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 12/18] clk: qcom: clk-krait: add apq/ipq8064 errata workaround Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 13/18] clk: qcom: clk-krait: add enable disable ops Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 14/18] dt-bindings: clock: Convert qcom,krait-cc to yaml Ansuel Smith
2022-03-21 21:51 ` Rob Herring
2022-03-21 15:38 ` [PATCH v5 15/18] dt-bindings: clock: Add L2 clocks to qcom,krait-cc Documentation Ansuel Smith
2022-03-21 21:50 ` Rob Herring
2022-03-21 21:31 ` Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 16/18] ARM: dts: qcom: qcom-ipq8064: add missing krait-cc compatible and clocks Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 17/18] dt-bindings: arm: msm: Convert kpss-acc driver Documentation to yaml Ansuel Smith
2022-03-21 15:38 ` [PATCH v5 18/18] dt-bindings: arm: msm: Convert kpss-gcc " Ansuel Smith
2022-03-21 19:18 ` Rob Herring
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