diff options
| -rw-r--r-- | drivers/misc/cs5535-mfgpt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/misc/cs5535-mfgpt.c b/drivers/misc/cs5535-mfgpt.c index 2d44b3300104..6f6218061b0d 100644 --- a/drivers/misc/cs5535-mfgpt.c +++ b/drivers/misc/cs5535-mfgpt.c @@ -211,6 +211,17 @@ EXPORT_SYMBOL_GPL(cs5535_mfgpt_alloc_timer); */ void cs5535_mfgpt_free_timer(struct cs5535_mfgpt_timer *timer) { + unsigned long flags; + uint16_t val; + + /* timer can be made available again only if never set up */ + val = cs5535_mfgpt_read(timer, MFGPT_REG_SETUP); + if (!(val & MFGPT_SETUP_SETUP)) { + spin_lock_irqsave(&timer->chip->lock, flags); + __set_bit(timer->nr, timer->chip->avail); + spin_unlock_irqrestore(&timer->chip->lock, flags); + } + kfree(timer); } EXPORT_SYMBOL_GPL(cs5535_mfgpt_free_timer); |