Author: avos
Date: Tue Jan 1 23:41:16 2019
New Revision: 342672
URL: https://svnweb.freebsd.org/changeset/base/342672
Log:
rtwn_pci: fix excessive packet loss on Tx with RTL8188EE.
Use proper flags for bus_dmamap_sync() in Tx path.
Tested with: RTL8188EE, STA mode
MFC after: 4 days
Modified:
head/sys/dev/rtwn/pci/rtwn_pci_tx.c
Modified: head/sys/dev/rtwn/pci/rtwn_pci_tx.c
==============================================================================
--- head/sys/dev/rtwn/pci/rtwn_pci_tx.c Tue Jan 1 20:12:58 2019
(r342671)
+++ head/sys/dev/rtwn/pci/rtwn_pci_tx.c Tue Jan 1 23:41:16 2019
(r342672)
@@ -174,8 +174,8 @@ rtwn_pci_tx_start_frame(struct rtwn_softc *sc, struct
rtwn_dump_tx_desc(sc, txd);
bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
- BUS_DMASYNC_POSTWRITE);
- bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
data->m = m;
data->ni = ni;
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