diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-09-20 10:44:05 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-10-01 09:41:23 +0300 |
| commit | f7324d4ba9e846e96ac85fbe74afe3fbdacf3b75 (patch) | |
| tree | eb4a8f1db2b91f1df2cc8a360247098ef3ec5364 /drivers/char/hw_random | |
| parent | adad556efcdd42a1d9e060cbe5f6161cccf1fa28 (diff) | |
| download | linux-f7324d4ba9e846e96ac85fbe74afe3fbdacf3b75.tar.xz | |
hwrng: meson - Improve error handling for core clock
-ENOENT (ie. "there is no clock") is fine to ignore for an optional
clock, other values are not supposed to be ignored and should be
escalated to the caller (e.g. -EPROBE_DEFER). Ignore -ENOENT by using
devm_clk_get_optional().
While touching this code also add an error message for the fatal errors.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/meson-rng.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/hw_random/meson-rng.c b/drivers/char/hw_random/meson-rng.c index e446236e81f2..8bb30282ca46 100644 --- a/drivers/char/hw_random/meson-rng.c +++ b/drivers/char/hw_random/meson-rng.c @@ -54,9 +54,10 @@ static int meson_rng_probe(struct platform_device *pdev) if (IS_ERR(data->base)) return PTR_ERR(data->base); - data->core_clk = devm_clk_get(dev, "core"); + data->core_clk = devm_clk_get_optional(dev, "core"); if (IS_ERR(data->core_clk)) - data->core_clk = NULL; + return dev_err_probe(dev, PTR_ERR(data->core_clk), + "Failed to get core clock\n"); if (data->core_clk) { ret = clk_prepare_enable(data->core_clk); |