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Subject[PATCH 27/38] usbnet: remove invalid check
Date
skb->len is always non-negative.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
---
drivers/net/usb/lan78xx.c | 5 -----
drivers/net/usb/smsc75xx.c | 5 -----
drivers/net/usb/smsc95xx.c | 5 -----
3 files changed, 15 deletions(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index a39518f..e0556dc 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2522,11 +2522,6 @@ static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb)
skb_pull(skb, align_count);
}

- if (unlikely(skb->len < 0)) {
- netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
- return 0;
- }
-
return 1;
}

diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index d9e7892..30033db 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -2185,11 +2185,6 @@ static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
skb_pull(skb, align_count);
}

- if (unlikely(skb->len < 0)) {
- netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
- return 0;
- }
-
return 1;
}

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 26423ad..66b3ab9 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1815,11 +1815,6 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
skb_pull(skb, align_count);
}

- if (unlikely(skb->len < 0)) {
- netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
- return 0;
- }
-
return 1;
}

--
1.9.1


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