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staging: et131x: Remove incorrect comments regarding alignment 

A previous change removed code that aligned memory returned from
dma_alloc_coherent() to a 4k boundary, which was not necessary.

Some comments regarding this alignment still exist, so remove them
as they no longer apply.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Mark Einon 2012-11-16 10:47:40 +00:00 committed by Greg Kroah-Hartman
parent 823bb2e8e1
commit 9967bd4842
1 changed files with 0 additions and 10 deletions
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10
drivers/staging/et131x/et131x.c
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@ -2310,13 +2310,6 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
for (i = 0; i < (rx_ring->fbr[id]->num_entries / FBR_CHUNKS); i++) {
dma_addr_t fbr_tmp_physaddr;
/* This code allocates an area of memory big enough for
* N free buffers + (buffer_size - 1) so that the
* buffers can be aligned on 4k boundaries. If each
* buffer were aligned to a buffer_size boundary, the
* effect would be to double the size of FBR0. By
* allocating N buffers at once, we reduce this overhead
*/
rx_ring->fbr[id]->mem_virtaddrs[i] = dma_alloc_coherent(
&adapter->pdev->dev, fbr_chunksize,
&rx_ring->fbr[id]->mem_physaddrs[i],
@ -2901,9 +2894,6 @@ static int et131x_tx_dma_memory_alloc(struct et131x_adapter *adapter)
return -ENOMEM;
}
/* Allocate enough memory for the Tx descriptor ring, and allocate
* some extra so that the ring can be aligned on a 4k boundary.
*/
desc_size = (sizeof(struct tx_desc) * NUM_DESC_PER_RING_TX);
tx_ring->tx_desc_ring =
(struct tx_desc *) dma_alloc_coherent(&adapter->pdev->dev,