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| author | Hans de Goede <hdegoede@redhat.com> | 2017-01-22 17:14:07 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2017-01-30 09:19:26 +0100 |
| commit | 69efb3439ccf2ce72e01edde05d2c63d624e251e (patch) | |
| tree | d7082ea34b7b89a9a6cf3aec911e1f3046c39fb9 /drivers/pwm/core.c | |
| parent | 42883cbc086b3f7aca9f1754f2d570af922825fc (diff) | |
| download | linux-69efb3439ccf2ce72e01edde05d2c63d624e251e.tar.gz linux-69efb3439ccf2ce72e01edde05d2c63d624e251e.tar.bz2 linux-69efb3439ccf2ce72e01edde05d2c63d624e251e.zip | |
pwm: Don't hold pwm_lookup_lock longer than necessary
There is no need to hold pwm_lookup_lock after we're done with looping
over pwm_lookup_list, so release it earlier.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/core.c')
| -rw-r--r-- | drivers/pwm/core.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index e3d6c5437070..799c4fb4cc2f 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -759,9 +759,9 @@ void pwm_remove_table(struct pwm_lookup *table, size_t num) */ struct pwm_device *pwm_get(struct device *dev, const char *con_id) { - struct pwm_device *pwm = ERR_PTR(-EPROBE_DEFER); const char *dev_id = dev ? dev_name(dev) : NULL; - struct pwm_chip *chip = NULL; + struct pwm_device *pwm; + struct pwm_chip *chip; unsigned int best = 0; struct pwm_lookup *p, *chosen = NULL; unsigned int match; @@ -819,24 +819,22 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id) } } - if (!chosen) { - pwm = ERR_PTR(-ENODEV); - goto out; - } + mutex_unlock(&pwm_lookup_lock); + + if (!chosen) + return ERR_PTR(-ENODEV); chip = pwmchip_find_by_name(chosen->provider); if (!chip) - goto out; + return ERR_PTR(-EPROBE_DEFER); pwm = pwm_request_from_chip(chip, chosen->index, con_id ?: dev_id); if (IS_ERR(pwm)) - goto out; + return pwm; pwm->args.period = chosen->period; pwm->args.polarity = chosen->polarity; -out: - mutex_unlock(&pwm_lookup_lock); return pwm; } EXPORT_SYMBOL_GPL(pwm_get); |