[PATCH V2 3/4] i2c/au1550: increase timeout waiting for master done

[Manuel Lauss <manuel.lauss-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>]

Double the timeout in the loop which busy-waits for the "master-done"
bit to be set.  This bit indicates whether an i2c transaction has
completed;  on the DB1300 board this timeout is slightly too small
and causes transactions to the WM8731 codec to be falsely flagged
as failed.  The timeout itself is necessary since transactions to
non-existant slaves never set this bit in the first place and hang
e.g. i2cdetect.

With this change the WM8731 codec on the DB1300 board is correctly
detected and initialized.

Signed-off-by: Manuel Lauss <manuel.lauss-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
V2: changed timeout only for master done bit, updated patch description.

 drivers/i2c/busses/i2c-au1550.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c
index 98ee11a..4f5150c 100644
--- a/drivers/i2c/busses/i2c-au1550.c
+++ b/drivers/i2c/busses/i2c-au1550.c
@@ -101,7 +101,7 @@ static int wait_master_done(struct i2c_au1550_data *adap)
 	int i;
 
 	/* Wait for Master Done. */
-	for (i = 0; i < adap->xfer_timeout; i++) {
+	for (i = 0; i < 2 * adap->xfer_timeout; i++) {
 		if ((RD(adap, PSC_SMBEVNT) & PSC_SMBEVNT_MD) != 0)
 			return 0;
 		udelay(1);
-- 
1.7.6.1