From 33a206276bf692be5081423ce5e7b4cc6bf0d7fd Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Fri, 8 Mar 2013 07:44:56 -0800 Subject: [PATCH] Drop read/write lock The read/write lock is acquired for each read/write operation from/to the chip. This occurs either during initialization, when it is not needed, or during updates, when the update_lock is held as well, and it is not needed either. Signed-off-by: Guenter Roeck --- nct6775.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/nct6775.c b/nct6775.c index 3725836..c15eb27 100644 --- a/nct6775.c +++ b/nct6775.c @@ -555,7 +555,6 @@ struct nct6775_data { const char *name; struct device *hwmon_dev; - struct mutex lock; u16 reg_temp[4][NUM_TEMP]; /* 0=temp, 1=temp_over, 2=temp_hyst, * 3=temp_crit @@ -746,8 +745,6 @@ static u16 nct6775_read_value(struct nct6775_data *data, u16 reg) { int res, word_sized = is_word_sized(data, reg); - mutex_lock(&data->lock); - nct6775_set_bank(data, reg); outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); res = inb_p(data->addr + DATA_REG_OFFSET); @@ -756,8 +753,6 @@ static u16 nct6775_read_value(struct nct6775_data *data, u16 reg) data->addr + ADDR_REG_OFFSET); res = (res << 8) + inb_p(data->addr + DATA_REG_OFFSET); } - - mutex_unlock(&data->lock); return res; } @@ -765,8 +760,6 @@ static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value) { int word_sized = is_word_sized(data, reg); - mutex_lock(&data->lock); - nct6775_set_bank(data, reg); outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); if (word_sized) { @@ -775,8 +768,6 @@ static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value) data->addr + ADDR_REG_OFFSET); } outb_p(value & 0xff, data->addr + DATA_REG_OFFSET); - - mutex_unlock(&data->lock); return 0; } @@ -3417,7 +3408,6 @@ static int nct6775_probe(struct platform_device *pdev) data->kind = sio_data->kind; data->addr = res->start; - mutex_init(&data->lock); mutex_init(&data->update_lock); data->name = nct6775_device_names[data->kind]; data->bank = 0xff; /* Force initial bank selection */ -- 2.39.2