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authorRoel Kluin <roel.kluin@gmail.com>2010-01-16 20:43:12 +0100
committerJean Delvare <khali@linux-fr.org>2010-01-16 20:43:12 +0100
commitb6a3195070fe1c12d0bb1099ffe997d8abf9f602 (patch)
treec53534397e22f9260820a635a3f3537d1a416748 /drivers/i2c/busses/i2c-viapro.c
parent0b2c3688445ff02d3f1bfffc6983417b28f8c3da (diff)
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>
Diffstat (limited to 'drivers/i2c/busses/i2c-viapro.c')
-rw-r--r--drivers/i2c/busses/i2c-viapro.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index e4b1543015af..a84a909e1234 100644
--- 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");
}