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authorstephen hemminger <stephen@networkplumber.org>2017-01-24 13:06:14 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-24 16:29:01 -0500
commitb58a185801dab4eefccad868c466296795c5bae7 (patch)
tree2bab381bd3dccf7f354c59dce0995cf305aef871 /drivers/net/hyperv
parent6c80f3fc2398aef22798e8ac4258454b1062f3fb (diff)
downloadlinux-b58a185801dab4eefccad868c466296795c5bae7.tar.bz2
netvsc: simplify get next send section
Use kernel for_each_clear_bit macro to simplify finding next available send section. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv')
-rw-r--r--drivers/net/hyperv/netvsc.c28
1 files changed, 8 insertions, 20 deletions
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index c70c4ac77b74..5cfdb1a1b4c1 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -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,