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diff packages/io/eth/current/src/net/eth_drv.c @ 182:f62680ef1804

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Merge from eCos master repository on 2001-09-07-06:43:02-BST
author jlarmour
date Wed, 12 Sep 2001 00:59:17 +0000
parents 2bdd82a025e1
children 022f1e506033
line wrap: on
line diff
--- a/packages/io/eth/current/src/net/eth_drv.c
+++ b/packages/io/eth/current/src/net/eth_drv.c
@@ -626,8 +626,13 @@ eth_drv_tx_done(struct eth_drv_sc *sc, C
     // Check for errors here (via 'status')
     ifp->if_opackets++;
     // Done with packet
-    mbuf_key = m0;
-    m_freem(m0);
+
+    // Guard against a NULL return - can be caused by race conditions in
+    // the driver, this is the neatest fixup:
+    if (m0) { 
+        mbuf_key = m0;
+        m_freem(m0);
+    }
     // Start another if possible
     eth_drv_send(ifp);
     CYGARC_HAL_RESTORE_GP();