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| author | Baochen Qiang <[email protected]> | 2025-02-20 08:24:42 +0000 |
|---|---|---|
| committer | Jeff Johnson <[email protected]> | 2025-06-07 14:36:02 +0000 |
| commit | 9f6e82d11bb9692a90d20b10f87345598945c803 (patch) | |
| tree | 4228d8ffc3372f8b1bc11a1b190b6e529dd7034d /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | wil6210: fix support for sparrow chipsets (diff) | |
| download | kernel-9f6e82d11bb9692a90d20b10f87345598945c803.tar.gz kernel-9f6e82d11bb9692a90d20b10f87345598945c803.zip | |
wifi: ath11k: avoid burning CPU in ath11k_debugfs_fw_stats_request()
We get report [1] that CPU is running a hot loop in
ath11k_debugfs_fw_stats_request():
94.60% 0.00% i3status [kernel.kallsyms] [k] do_syscall_64
|
--94.60%--do_syscall_64
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--94.55%--__sys_sendmsg
___sys_sendmsg
____sys_sendmsg
netlink_sendmsg
netlink_unicast
genl_rcv
netlink_rcv_skb
genl_rcv_msg
|
--94.55%--genl_family_rcv_msg_dumpit
__netlink_dump_start
netlink_dump
genl_dumpit
nl80211_dump_station
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--94.55%--ieee80211_dump_station
sta_set_sinfo
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--94.55%--ath11k_mac_op_sta_statistics
ath11k_debugfs_get_fw_stats
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--94.55%--ath11k_debugfs_fw_stats_request
|
|--41.73%--_raw_spin_lock_bh
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|--22.74%--__local_bh_enable_ip
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|--9.22%--_raw_spin_unlock_bh
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--6.66%--srso_alias_safe_ret
This is because, if for whatever reason ar->fw_stats_done is not set by
ath11k_update_stats_event(), ath11k_debugfs_fw_stats_request() won't yield
CPU before an up to 3s timeout.
Change to completion mechanism to avoid CPU burning.
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.37
Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Reported-by: Yury Vostrikov <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/ # [1]
Signed-off-by: Baochen Qiang <[email protected]>
Reviewed-by: Vasanthakumar Thiagarajan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jeff Johnson <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions