Commit b58a1858 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

netvsc: simplify get next send section 



Use kernel for_each_clear_bit macro to simplify finding next
available send section.

Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6c80f3fc

drivers/net/hyperv/netvsc.c

+8 −20
Original line number Diff line number Diff line
@@ -680,27 +680,15 @@ static void netvsc_send_completion(struct netvsc_device *net_device, 


static u32 netvsc_get_next_send_section(struct netvsc_device *net_device)

{

	unsigned long index;

	u32 max_words = net_device->map_words;

	unsigned long *map_addr = (unsigned long *)net_device->send_section_map;

	u32 section_cnt = net_device->send_section_cnt;

	int ret_val = NETVSC_INVALID_INDEX;

	int i;

	int prev_val;



	for (i = 0; i < max_words; i++) {

		if (!~(map_addr[i]))

			continue;

		index = ffz(map_addr[i]);

		prev_val = sync_test_and_set_bit(index, &map_addr[i]);

		if (prev_val)

			continue;

		if ((index + (i * BITS_PER_LONG)) >= section_cnt)

			break;

		ret_val = (index + (i * BITS_PER_LONG));

		break;

	unsigned long *map_addr = net_device->send_section_map;

	unsigned int i;



	for_each_clear_bit(i, map_addr, net_device->map_words) {

		if (sync_test_and_set_bit(i, map_addr) == 0)

			return i;

	}

	return ret_val;



	return NETVSC_INVALID_INDEX;

}



static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,