hwmon: (nct6775) 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 <linux@roeck-us.net>

1 files changed, 0 insertions, 10 deletions

diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 752fbd7efb32..2269bb241b83 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -554,7 +554,6 @@ 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
@@ -745,8 +744,6 @@ 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);
@@ -755,8 +752,6 @@ 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;
 }
 
@@ -764,8 +759,6 @@ 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) {
@@ -774,8 +767,6 @@ 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;
 }
 
@@ -3416,7 +3407,6 @@ 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 */