[patch 13/51] i2c-algo-bit: Fix timeout test
From: Greg KH
Date: Thu May 14 2009 - 18:46:52 EST
2.6.29-stable review patch. If anyone has any objections, please let us know.
------------------
From: Dave Airlie <airlied@xxxxxxxxxx>
commit 0cdba07bb23cdd3e0d64357ec3d983e6b75e541f upstream
When fetching DDC using i2c algo bit, we were often seeing timeouts
before getting valid EDID on a retry. The VESA spec states 2ms is the
DDC timeout, so when this translates into 1 jiffie and we are close
to the end of the time period, it could return with a timeout less than
2ms.
Change this code to use time_after instead of time_after_eq.
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/i2c/algos/i2c-algo-bit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/i2c/algos/i2c-algo-bit.c
+++ b/drivers/i2c/algos/i2c-algo-bit.c
@@ -104,7 +104,7 @@ static int sclhi(struct i2c_algo_bit_dat
* chips may hold it low ("clock stretching") while they
* are processing data internally.
*/
- if (time_after_eq(jiffies, start + adap->timeout))
+ if (time_after(jiffies, start + adap->timeout))
return -ETIMEDOUT;
cond_resched();
}
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