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| author | Nicholas Mc Guire <hofrat@osadl.org> | 2015-03-17 08:51:13 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-03-27 16:53:42 +0100 |
| commit | d9e1f4417a43cd0871253b2158eae07a48d656b5 (patch) | |
| tree | 99773d332d038a1e01762d7163d83fbf6537322b /drivers/i2c | |
| parent | i2c: mpc: Fix ISR return value (diff) | |
| download | linux-d9e1f4417a43cd0871253b2158eae07a48d656b5.tar.xz linux-d9e1f4417a43cd0871253b2158eae07a48d656b5.zip | |
i2c: davinci: fixup wait_for_completion_timeout handling
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@osadl.org>
Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-davinci.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index 6dc7ff5d3d9a..120a4ef36ef5 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)) |