From: Viresh Kumar <viresh.kumar@linaro.org>
To: Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
linux-pm@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Rafael Wysocki <rjw@rjwysocki.net>,
Dmitry Osipenko <digetx@gmail.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH V2] opp: Don't ignore clk_get() errors other than -ENOENT
Date: Mon, 1 Feb 2021 09:52:58 +0530 [thread overview]
Message-ID: <61854037cd4d3ac367cfda3f02fd1557b1b3bb8b.1612153322.git.viresh.kumar@linaro.org> (raw)
Not all devices that need to use OPP core need to have clocks, a missing
clock is fine in which case -ENOENT shall be returned by clk_get().
Anything else is an error and must be handled properly.
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
V2:
- s/ENODEV/ENOENT
- Use dev_err_probe()
Stephen, is the understanding correct that -ENOENT is the only error
returned for missing clocks ?
drivers/opp/core.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index a518173fd64a..0beb3ee79523 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1252,6 +1252,8 @@ static struct opp_table *_update_opp_table_clk(struct device *dev,
struct opp_table *opp_table,
bool getclk)
{
+ int ret;
+
/*
* Return early if we don't need to get clk or we have already tried it
* earlier.
@@ -1261,18 +1263,19 @@ static struct opp_table *_update_opp_table_clk(struct device *dev,
/* Find clk for the device */
opp_table->clk = clk_get(dev, NULL);
- if (IS_ERR(opp_table->clk)) {
- int ret = PTR_ERR(opp_table->clk);
- if (ret == -EPROBE_DEFER) {
- dev_pm_opp_put_opp_table(opp_table);
- return ERR_PTR(ret);
- }
+ ret = PTR_ERR_OR_ZERO(opp_table->clk);
+ if (!ret)
+ return opp_table;
+ if (ret == -ENOENT) {
dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
+ return opp_table;
}
- return opp_table;
+ dev_pm_opp_put_opp_table(opp_table);
+
+ return ERR_PTR(dev_err_probe(dev, ret, "Couldn't find clock\n"));
}
/*
--
2.25.0.rc1.19.g042ed3e048af
next reply other threads:[~2021-02-01 4:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 4:22 Viresh Kumar [this message]
2021-02-01 19:54 ` [PATCH V2] opp: Don't ignore clk_get() errors other than -ENOENT Dmitry Osipenko
2021-02-02 4:35 ` Viresh Kumar
2021-02-11 19:19 ` Stephen Boyd
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