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i2c-pxa2xx: check timeout correctly

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timeout here maybe 0 if the event occured and a task with a higher
priority stole the cpu and we were sleeping longer than the timeout
value we specified.
In case of a real timeout I changed the error code to I2C_RETRY so we
retry the transfer.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Sebastian Andrzej Siewior 2011-02-23 12:38:19 +01:00 committed by Ben Dooks
parent c66dc52919
commit 93c92cfdec
1 changed files with 3 additions and 1 deletions
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4
drivers/i2c/busses/i2c-pxa.c
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@ -770,8 +770,10 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
*/
ret = i2c->msg_idx;
if (timeout == 0)
if (!timeout && i2c->msg_num) {
i2c_pxa_scream_blue_murder(i2c, "timeout");
ret = I2C_RETRY;
}
out:
return ret;