From 3e7ce38dce642ecc8faa12e6efb2229ab389808e Mon Sep 17 00:00:00 2001 From: "kaf24@firebug.cl.cam.ac.uk" Date: Thu, 16 Nov 2006 08:56:58 +0000 Subject: [PATCH] [NET] back: Fix bug in 12262:ac2097d71e06dbbf77279af10d6ae7359d921ab0. Pointed out by Jan Beulich. Signed-off-by: Keir Fraser --- linux-2.6-xen-sparse/drivers/xen/netback/netback.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/linux-2.6-xen-sparse/drivers/xen/netback/netback.c b/linux-2.6-xen-sparse/drivers/xen/netback/netback.c index c4fb3e4383..19e0cdef17 100644 --- a/linux-2.6-xen-sparse/drivers/xen/netback/netback.c +++ b/linux-2.6-xen-sparse/drivers/xen/netback/netback.c @@ -825,7 +825,9 @@ static void tx_add_credit(netif_t *netif) max_burst = max(max_burst, netif->credit_bytes); /* Take care that adding a new chunk of credit doesn't wrap to zero. */ - max_credit = max(netif->remaining_credit + netif->credit_bytes, ~0UL); + max_credit = netif->remaining_credit + netif->credit_bytes; + if (max_credit < netif->remaining_credit) + max_credit = ULONG_MAX; /* wrapped: clamp to ULONG_MAX */ netif->remaining_credit = min(max_credit, max_burst); } -- 2.30.2