[patch] regulator: lp3971: Silence uninitialized variable warning

[Dan Carpenter]

This is harmless but if lp3971_i2c_read() fails then "tmp" can be
uninitialized.  Silence the warning by moving the error handling up a
line.

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c
index 15c25c6..204b5c5 100644
--- a/drivers/regulator/lp3971.c
+++ b/drivers/regulator/lp3971.c
@@ -365,8 +365,8 @@ static int lp3971_set_bits(struct lp3971 *lp3971, u8 reg, 
u16 mask, u16 val)
        mutex_lock(&lp3971->io_lock);
 
        ret = lp3971_i2c_read(lp3971->i2c, reg, 1, &tmp);
-       tmp = (tmp & ~mask) | val;
        if (ret == 0) {
+               tmp = (tmp & ~mask) | val;
                ret = lp3971_i2c_write(lp3971->i2c, reg, 1, &tmp);
                dev_dbg(lp3971->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
                        (unsigned)val&0xff);