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The RX_FREEBUFFER registers are a write to increment field.

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Writing the full queue size to it every time was makeing it overflow with a
lot of bogus values.

This fixes the interrupt storms on irq 40.

Sponsored by:	Rubicon Communications, LLC (Netgate)
This commit is contained in:
Luiz Otavio O Souza 2016-12-01 02:35:15 +00:00
parent 33d19692e8
commit 71462f5652
1 changed files with 1 additions and 1 deletions
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2
sys/arm/ti/cpsw/if_cpsw.c
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@ -1760,7 +1760,7 @@ cpsw_rx_enqueue(struct cpsw_softc *sc)
sc->rx.queue_adds += added;
sc->rx.avail_queue_len -= added;
sc->rx.active_queue_len += added;
cpsw_write_4(sc, CPSW_CPDMA_RX_FREEBUFFER(0), sc->rx.active_queue_len);
cpsw_write_4(sc, CPSW_CPDMA_RX_FREEBUFFER(0), added);
if (sc->rx.active_queue_len > sc->rx.max_active_queue_len) {
sc->rx.max_active_queue_len = sc->rx.active_queue_len;
}