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authorMichael Thalmeier <Michael.Thalmeier@sigmatek.at>2011-07-15 05:28:26 +0400
committerDavid S. Miller <davem@davemloft.net>2011-07-15 19:10:33 +0400
commit0d9b6e738a22244d38def847a24e5ee6fcedd898 (patch)
tree21ca5f7bc9713f2e1d7caad7758e2d0e245a7bc5
parent62f2a3a48bdc99822a24356e667e52c30df287c9 (diff)
downloadlinux-0d9b6e738a22244d38def847a24e5ee6fcedd898.tar.xz
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>
-rw-r--r--drivers/net/r6040.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c
index 200a363c3bf5..0ffec4608441 100644
--- a/drivers/net/r6040.c
+++ b/drivers/net/r6040.c
@@ -677,9 +677,11 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id)
if (status & RX_FIFO_FULL)
dev->stats.rx_fifo_errors++;
- /* Mask off RX interrupt */
- misr &= ~RX_INTS;
- napi_schedule(&lp->napi);
+ if (likely(napi_schedule_prep(&lp->napi))) {
+ /* Mask off RX interrupt */
+ misr &= ~RX_INTS;
+ __napi_schedule(&lp->napi);
+ }
}
/* TX interrupt request */