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ixgbevf: Do not rewind the Rx ring before bumping tail 

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));
}
}