ixl(4): force mss of tso packets in hardware supported range.

ok bluhm@

diff --git a/sys/dev/pci/if_ixl.c b/sys/dev/pci/if_ixl.c
index 36ce95a..398b995 100644 (file)
--- a/sys/dev/pci/if_ixl.c
+++ b/sys/dev/pci/if_ixl.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if_ixl.c,v 1.99 2024/05/07 18:35:23 jan Exp $ */
+/*     $OpenBSD: if_ixl.c,v 1.100 2024/05/08 17:52:11 jan Exp $ */
 
 /*
  * Copyright (c) 2013-2015, Intel Corporation
@@ -2854,7 +2854,11 @@ ixl_tx_setup_offload(struct mbuf *m0, struct ixl_tx_ring *txr,
 
                        hlen += ext.tcphlen;
 
-                       outlen = m0->m_pkthdr.ph_mss;
+                       /*
+                        * The MSS should not be set to a lower value than 64
+                        * or larger than 9668 bytes.
+                        */
+                       outlen = MIN(9668, MAX(64, m0->m_pkthdr.ph_mss));
                        paylen = m0->m_pkthdr.len - ETHER_HDR_LEN - hlen;
 
                        ring = IXL_DMA_KVA(&txr->txr_mem);