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In case a new mbuf can't be loaded, reuse the old one.

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This commit is contained in:
Bernhard Schmidt 2011-04-16 09:34:40 +00:00
parent 3f01dc2d9d
commit f75e83846a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=220693
1 changed files with 12 additions and 0 deletions
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12
sys/dev/iwn/if_iwn.c
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@ -2108,6 +2108,18 @@ iwn_rx_done(struct iwn_softc *sc, struct iwn_rx_desc *desc,
device_printf(sc->sc_dev,
"%s: bus_dmamap_load failed, error %d\n", __func__, error);
m_freem(m1);
/* Try to reload the old mbuf. */
error = bus_dmamap_load(ring->data_dmat, data->map,
mtod(data->m, void *), IWN_RBUF_SIZE, iwn_dma_map_addr,
&paddr, BUS_DMA_NOWAIT);
if (error != 0 && error != EFBIG) {
panic("%s: could not load old RX mbuf", __func__);
}
/* Physical address may have changed. */
ring->desc[ring->cur] = htole32(paddr >> 8);
bus_dmamap_sync(ring->data_dmat, ring->desc_dma.map,
BUS_DMASYNC_PREWRITE);
ifp->if_ierrors++;
return;
}