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[NET] back: Fix bug in 12262:ac2097d71e06dbbf77279af10d6ae7359d921ab0.
Pointed out by Jan Beulich. Signed-off-by: Keir Fraser <keir@xensource.com>
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kaf24@firebug.cl.cam.ac.uk committed
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1 file changed
+3
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@@ -825,7 +825,9 @@ static void tx_add_credit(netif_t *netif)
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max_burst = max(max_burst, netif->credit_bytes);
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/* Take care that adding a new chunk of credit doesn't wrap to zero. */
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max_credit = max(netif->remaining_credit + netif->credit_bytes, ~0UL);
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max_credit = netif->remaining_credit + netif->credit_bytes;
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if (max_credit < netif->remaining_credit)
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max_credit = ULONG_MAX; /* wrapped: clamp to ULONG_MAX */
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netif->remaining_credit = min(max_credit, max_burst);
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}
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