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hv_netvsc: Remove unnecessary round_up for recv_completion_cnt

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The vzalloc_node(), already rounds the total size to whole pages, and
sizeof(u64) is smaller than sizeof(struct recv_comp_data). So
round_up of recv_completion_cnt is not necessary, and may cause extra
memory allocation.

To save memory, remove this unnecessary round_up for recv_completion_cnt.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2020-03-30 12:29:13 -07:00 committed by David S. Miller
parent d9679cd985
commit f87238d30c
1 changed files with 5 additions and 4 deletions
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9
drivers/net/hyperv/netvsc.c
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@ -388,10 +388,11 @@ static int netvsc_init_buf(struct hv_device *device,
net_device->recv_section_size = resp->sections[0].sub_alloc_size;
net_device->recv_section_cnt = resp->sections[0].num_sub_allocs;
/* Setup receive completion ring */
net_device->recv_completion_cnt
= round_up(net_device->recv_section_cnt + 1,
PAGE_SIZE / sizeof(u64));
/* Setup receive completion ring.
* Add 1 to the recv_section_cnt because at least one entry in a
* ring buffer has to be empty.
*/
net_device->recv_completion_cnt = net_device->recv_section_cnt + 1;
ret = netvsc_alloc_recv_comp_ring(net_device, 0);
if (ret)
goto cleanup;