On Thu, Apr 19, 2012 at 06:58:16PM +0530, Shubhrajyoti D wrote: > By definition, wait_for_completion_timeout() returns an unsigned value and > therefore, it is not necessary to check if the return value is less than zero > as this is not possible. > > This is based on a patch from Jon Hunter <[email protected]> > Changes from his patch > - Declare a long as the wait_for_completion_timeout returns long. > > Original patch is > http://git.omapzoom.org/?p=kernel/omap.git;a=commitdiff;h=ea02cece7b0000bc736e60c4188a11aaa74bc6e6
The original patch has a signed-off, so you need to include it here as well. > > Cc : Jon Hunter <[email protected]> > Signed-off-by: Shubhrajyoti D <[email protected]> > --- > drivers/i2c/busses/i2c-omap.c | 10 ++++------ > 1 files changed, 4 insertions(+), 6 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c > index 1777d79..fec8d5c 100644 > --- a/drivers/i2c/busses/i2c-omap.c > +++ b/drivers/i2c/busses/i2c-omap.c > @@ -473,7 +473,7 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, > struct i2c_msg *msg, int stop) > { > struct omap_i2c_dev *dev = i2c_get_adapdata(adap); > - int r; > + unsigned long timeout; > u16 w; > > dev_dbg(dev->dev, "addr: 0x%04x, len: %d, flags: 0x%x, stop: %d\n", > @@ -541,12 +541,10 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, > * REVISIT: We should abort the transfer on signals, but the bus goes > * into arbitration and we're currently unable to recover from it. > */ > - r = wait_for_completion_timeout(&dev->cmd_complete, > - OMAP_I2C_TIMEOUT); > + timeout = wait_for_completion_timeout(&dev->cmd_complete, > + OMAP_I2C_TIMEOUT); > dev->buf_len = 0; > - if (r < 0) > - return r; > - if (r == 0) { > + if (timeout == 0) { > dev_err(dev->dev, "controller timed out\n"); > omap_i2c_init(dev); > return -ETIMEDOUT; > -- > 1.7.5.4 > -- Pengutronix e.K. | Wolfram Sang | Industrial Linux Solutions | http://www.pengutronix.de/ |
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