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ixgbevf: Do not rewind the Rx ring before bumping tail

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The driver is going back one step from its' previous location before
bumping tail. This is incorrect.  We should just be writing the value of
next_to_use into the tail register.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2012-05-11 08:33:11 +00:00 committed by Jeff Kirsher
parent 5d9a533bac
commit 18c6308971
1 changed files with 2 additions and 5 deletions
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7
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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@ -375,8 +375,6 @@ static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
no_buffers:
if (rx_ring->next_to_use != i) {
rx_ring->next_to_use = i;
if (i-- == 0)
i = (rx_ring->count - 1);
ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
}
@ -1240,9 +1238,8 @@ static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
ixgbevf_configure_rx(adapter);
for (i = 0; i < adapter->num_rx_queues; i++) {
struct ixgbevf_ring *ring = &adapter->rx_ring[i];
ixgbevf_alloc_rx_buffers(adapter, ring, ring->count);
ring->next_to_use = ring->count - 1;
writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail);
ixgbevf_alloc_rx_buffers(adapter, ring,
IXGBE_DESC_UNUSED(ring));
}
}