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drivers/lcd/pcf8574: driver lock should in pairs

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Signed-off-by: chao an <anchao@xiaomi.com>
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chao an 2022-11-03 18:07:17 +08:00 committed by Petro Karashchenko
parent 5f795a4f0d
commit 6950ea4646
1 changed files with 1 additions and 0 deletions
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drivers/lcd/pcf8574_lcd_backpack.c
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@ -1064,6 +1064,7 @@ static int pcf8574_lcd_open(FAR struct file *filep)
nxmutex_lock(&priv->lock);
if (priv->refs == MAX_OPENCNT)
{
nxmutex_unlock(&priv->lock);
return -EMFILE;
}
else