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r6040: only disable RX interrupt if napi_schedule_prep is successful
When receiving the first RX interrupt before the internal call to napi_schedule_prep is successful the RX interrupt gets disabled and is never enabled again as the poll function never gets executed. Signed-off-by: Michael Thalmeier <Michael.Thalmeier@sigmatek.at> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 5 additions and 3 deletions
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@ -677,9 +677,11 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id)
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if (status & RX_FIFO_FULL)
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dev->stats.rx_fifo_errors++;
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/* Mask off RX interrupt */
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misr &= ~RX_INTS;
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napi_schedule(&lp->napi);
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if (likely(napi_schedule_prep(&lp->napi))) {
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/* Mask off RX interrupt */
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misr &= ~RX_INTS;
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__napi_schedule(&lp->napi);
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}
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}
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/* TX interrupt request */
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