wait_for_completion_timeout return 0 (timeout) or >=1 (completion) so the check
for >= 0 is always true and can be dropped implying that r==-EREMOTEIO and thus
the return of -EREMOTEIO can be done in the if (dev->buf_len) branch.
As wait_for_completion_timeout returns unsigned long not int, and int r is
exclusively used for wait_for_completion_timeout it is renamed and the type
changed to unsigned long.
Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
---
Patch was compile tested with davinci_all_defconfig (implies CONFIG_I2C_DAVINCI=y)
Patch is against 4.0-rc4 (localversion-next is -next-20150317)
drivers/i2c/busses/i2c-davinci.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 6dc7ff5..120a4ef 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -304,7 +304,7 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
struct davinci_i2c_platform_data *pdata = dev->pdata;
u32 flag;
u16 w;
- int r;
+ unsigned long time_left;
/* Introduce a delay, required for some boards (e.g Davinci EVM) */
if (pdata->bus_delay)
@@ -368,8 +368,9 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
flag |= DAVINCI_I2C_MDR_STP;
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag);
- r = wait_for_completion_timeout(&dev->cmd_complete, dev->adapter.timeout);
- if (r == 0) {
+ time_left = wait_for_completion_timeout(&dev->cmd_complete,
+ dev->adapter.timeout);
+ if (!time_left) {
dev_err(dev->dev, "controller timed out\n");
davinci_i2c_recover_bus(dev);
i2c_davinci_init(dev);
@@ -380,17 +381,13 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
/* This should be 0 if all bytes were transferred
* or dev->cmd_err denotes an error.
*/
- if (r >= 0) {
- dev_err(dev->dev, "abnormal termination buf_len=%i\n",
- dev->buf_len);
- r = -EREMOTEIO;
- }
+ dev_err(dev->dev, "abnormal termination buf_len=%i\n",
+ dev->buf_len);
dev->terminate = 1;
wmb();
dev->buf_len = 0;
+ return -EREMOTEIO;
}
- if (r < 0)
- return r;
/* no error */
if (likely(!dev->cmd_err))
--
1.7.10.4
--
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