From: Roel Kluin <roel.kluin-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: "Jean Delvare (PC drivers,
core)" <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>,
"Ben Dooks (embedded platforms)"
<ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: [PATCH] i2c: test off by one in {piix4,vt596}_transaction()
Date: Sun, 27 Dec 2009 15:49:22 +0100 [thread overview]
Message-ID: <4B3773F2.3010703@gmail.com> (raw)
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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/i2c/busses/i2c-piix4.c | 2 +-
drivers/i2c/busses/i2c-viapro.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 1e245e9..d8e0df0 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -329,7 +329,7 @@ static int piix4_transaction(void)
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..8a2e0d5 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -168,7 +168,7 @@ static int vt596_transaction(u8 size)
} 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");
}
next reply other threads:[~2009-12-27 14:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-27 14:49 Roel Kluin [this message]
[not found] ` <4B3773F2.3010703-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-01-05 16:55 ` [PATCH] i2c: test off by one in {piix4,vt596}_transaction() Jean Delvare
[not found] ` <20100105175511.39dc6c42-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2010-01-05 21:22 ` Roel Kluin
[not found] ` <4B43AD8F.2030809-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-01-06 11:14 ` Jean Delvare
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