diff options
| author | Ping-Ke Shih <pkshih@realtek.com> | 2019-11-18 11:14:54 +0800 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-11-20 09:41:29 +0200 |
| commit | 92541dd9dda5ab474751e24cdb4253eb290b8b33 (patch) | |
| tree | 1236e34fc1bfc4d8540dd1163c1e33afaa8d9fa0 /lib/test_bpf.c | |
| parent | f89f1aefff5a53917579bbf8b85be09d7cc17daf (diff) | |
rtlwifi: rf_lock use non-irqsave spin_lock
rf_lock is used to protect RF register access, but they will not called
from interrupt context, so *_irqsave version isn't necessary. Then, these
delays don't affect IRQ services.
The old code holds spin_lock_irqsave() that will be detected a long delay
as below:
kworker/-276 4d... 0us : _raw_spin_lock_irqsave
kworker/-276 4d... 0us : rtl8723_phy_rf_serial_read <-rtl8723de_phy_set_rf_reg
kworker/-276 4d... 1us : rtl8723_phy_query_bb_reg <-rtl8723_phy_rf_serial_read
kworker/-276 4d... 3us : rtl8723_phy_set_bb_reg <-rtl8723_phy_rf_serial_read
kworker/-276 4d... 4us : __const_udelay <-rtl8723_phy_rf_serial_read
kworker/-276 4d... 4us!: delay_mwaitx <-rtl8723_phy_rf_serial_read
kworker/-276 4d... 1004us : rtl8723_phy_set_bb_reg <-rtl8723_phy_rf_serial_read
[...]
Reported-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'lib/test_bpf.c')
0 files changed, 0 insertions, 0 deletions