tree 72bc1cd4a60af46c4250234ae2a968660eac8d3c
parent a23f6ce6d95900ca83b44b6fa691afe6c7d4b941
author stephen hemminger <stephen@networkplumber.org> 1493084018 -0700
committer David S. Miller <davem@davemloft.net> 1493135819 -0400

netvsc: fix calculation of available send sections

My change (introduced in 4.11) to use find_first_clear_bit
incorrectly assumed that the size argument was words, not bits.
The effect was only a small limited number of the available send
sections were being actually used. This can cause performance loss
with some workloads.

Since map_words is now used only during initialization, it can
be on stack instead of in per-device data.

Fixes: b58a185801da ("netvsc: simplify get next send section")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>