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>
diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index 9ccd9b7..703a874 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -2310,13 +2310,6 @@
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 @@
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,
