Author: raj
Date: Tue Feb 17 15:59:27 2009
New Revision: 188718
URL: http://svn.freebsd.org/changeset/base/188718
Log:
tsec(4): Always try to resume the receiver.
This helps recover from RX stall under heavy loads.
Submitted by: Piotr Ziecik kosmo ! semihalf dot com
Modified:
head/sys/dev/tsec/if_tsec.c
Modified: head/sys/dev/tsec/if_tsec.c
==============================================================================
--- head/sys/dev/tsec/if_tsec.c Tue Feb 17 15:58:42 2009 (r188717)
+++ head/sys/dev/tsec/if_tsec.c Tue Feb 17 15:59:27 2009 (r188718)
@@ -1363,6 +1363,16 @@ tsec_receive_intr_locked(struct tsec_sof
bus_dmamap_sync(sc->tsec_rx_dtag, sc->tsec_rx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+
+ /*
+ * Make sure TSEC receiver is not halted.
+ *
+ * Various conditions can stop the TSEC receiver, but not all are
+ * signaled and handled by error interrupt, so make sure the receiver
+ * is running. Writing to TSEC_REG_RSTAT restarts the receiver when
+ * halted, and is harmless if already running.
+ */
+ TSEC_WRITE(sc, TSEC_REG_RSTAT, TSEC_RSTAT_QHLT);
}
void
@@ -1507,9 +1517,6 @@ tsec_error_intr_locked(struct tsec_softc
/* Get data from RX buffers */
tsec_receive_intr_locked(sc, count);
-
- /* Make receiver again active */
- TSEC_WRITE(sc, TSEC_REG_RSTAT, TSEC_RSTAT_QHLT);
}
if (ifp->if_flags & IFF_DEBUG)
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