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Commit 18c63089 authored by Alexander Duyck's avatar Alexander Duyck Committed by Jeff Kirsher
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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: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: default avatarGreg Rose <gregory.v.rose@intel.com>
Tested-by: default avatarSibai Li <sibai.li@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 5d9a533b

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

+2 −5
Original line number Diff line number Diff line
@@ -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));

	}

}