i2c-i801: Clear only status bits in HST_STS

Writing back the whole status register could clear unwanted bits.
In particular, it could clear the "INUSE_STS" bit, which is a
'hardware semaphore', that might be useful to use some day.
To prepare for this, let's ban writing back the whole status to register
HST_STS, of which this is the only instance.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 51e11eb64abcdc40f0a6ecadacdfb6752f79cdc4..05f394938b82730b5b5b16f00784fc955ed613ca 100644 (file)
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -300,7 +300,7 @@ static void i801_wait_hwpec(struct i801_priv *priv)
        if (timeout > MAX_RETRIES)
                dev_dbg(&priv->pci_dev->dev, "PEC Timeout!\n");
 
-       outb_p(status, SMBHSTSTS(priv));
+       outb_p(status & STATUS_FLAGS, SMBHSTSTS(priv));
 }
 
 static int i801_block_transaction_by_block(struct i801_priv *priv,