i2c: Test off by one in {piix4,vt596}_transaction()

With `while (timeout++ < MAX_TIMEOUT)' timeout reaches MAX_TIMEOUT + 1
after the loop. This is probably unlikely to produce a problem.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 1e245e9..e56e4b6 100644 (file)
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -324,12 +324,12 @@ static int piix4_transaction(void)
        else
                msleep(1);
 
-       while ((timeout++ < MAX_TIMEOUT) &&
+       while ((++timeout < MAX_TIMEOUT) &&
               ((temp = inb_p(SMBHSTSTS)) & 0x01))
                msleep(1);
 
        /* If the SMBus is still busy, we give up */
-       if (timeout >= MAX_TIMEOUT) {
+       if (timeout == MAX_TIMEOUT) {
                dev_err(&piix4_adapter.dev, "SMBus Timeout!\n");
                result = -ETIMEDOUT;
        }

diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index e4b1543..a84a909 100644 (file)
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -165,10 +165,10 @@ static int vt596_transaction(u8 size)
        do {
                msleep(1);
                temp = inb_p(SMBHSTSTS);
-       } while ((temp & 0x01) && (timeout++ < MAX_TIMEOUT));
+       } while ((temp & 0x01) && (++timeout < MAX_TIMEOUT));
 
        /* If the SMBus is still busy, we give up */
-       if (timeout >= MAX_TIMEOUT) {
+       if (timeout == MAX_TIMEOUT) {
                result = -ETIMEDOUT;
                dev_err(&vt596_adapter.dev, "SMBus timeout!\n");
        }