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Date: Fri, 29 Jun 2018 17:38:14 +0300
From: Mikko Perttunen <mperttunen@...dia.com>
To: <pdeschrijver@...dia.com>, <mturquette@...libre.com>,
<sboyd@...nel.org>, <thierry.reding@...il.com>,
<jonathanh@...dia.com>
CC: <linux-clk@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <swarren@...dia.com>,
<vbhadram@...dia.com>, Mikko Perttunen <mperttunen@...dia.com>
Subject: [PATCH] clk: tegra: bpmp: Don't crash when a clock fails to register
When registering clocks, we just skip any that fail to register
(leaving a NULL hole in the clock table). However, our of_xlate
function still tries to dereference each entry while looking for
the clock with the requested id, causing a crash if any clocks
failed to register. Add a check to of_xlate to skip any NULL
clocks.
Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
---
drivers/clk/tegra/clk-bpmp.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c
index a896692b74ec..01dada561c10 100644
--- a/drivers/clk/tegra/clk-bpmp.c
+++ b/drivers/clk/tegra/clk-bpmp.c
@@ -586,9 +586,15 @@ static struct clk_hw *tegra_bpmp_clk_of_xlate(struct of_phandle_args *clkspec,
unsigned int id = clkspec->args[0], i;
struct tegra_bpmp *bpmp = data;
- for (i = 0; i < bpmp->num_clocks; i++)
- if (bpmp->clocks[i]->id == id)
- return &bpmp->clocks[i]->hw;
+ for (i = 0; i < bpmp->num_clocks; i++) {
+ struct tegra_bpmp_clk *clk = bpmp->clocks[i];
+
+ if (!clk)
+ continue;
+
+ if (clk->id == id)
+ return &clk->hw;
+ }
return NULL;
}
--
2.16.1
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