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| author |   Ping-Ke Shih <pkshih@realtek.com> | 2018-01-17 14:15:21 +0800 |
|---|---|---|
| committer |   Kalle Valo <kvalo@codeaurora.org> | 2018-01-17 17:09:10 +0200 |
| commit | a3fa3669d18c959c265eda2048b998c0062a61ce (patch) | |
| tree | 50aac2c73bb59847acc8bc536ce567b6218905a8 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | mt76: fix possible NULL pointer dereferencing in mt76x2_mac_write_txwi() (diff) | |
| download | linux-dev-a3fa3669d18c959c265eda2048b998c0062a61ce.tar.xz linux-dev-a3fa3669d18c959c265eda2048b998c0062a61ce.zip | |
rtlwifi: Use mutex to replace spin_lock to protect IPS and LPS
Enter/leavel IPS and LPS are large critical section, and they can't use
sleep function because running in atomic-context, which own a spin_lock.
In commit ba9f93f82aba ("rtlwifi: Fix enter/exit power_save"), it moves
LPS functions to thread-context, so this commit can simply change LPS's
spin lock to mutex.
Considering IPS functions, rtl_ips_nic_on() may be called by TX tasklet
(softirq-context) that check whether packet is auth frame. Fortunately,
current mac80211 will ask driver to leave IPS using op_config with
changed flag IEEE80211_CONF_CHANGE_IDLE, before issuing auth frame, so
IPS functions can run in thread-context and use mutex to protect critical
section, too.
Also, this commit removes some useless spin locks.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions