diff options
| author | Jeff Johnson <quic_jjohnson@quicinc.com> | 2024-11-19 07:47:39 -0800 |
|---|---|---|
| committer | Jeff Johnson <quic_jjohnson@quicinc.com> | 2024-11-21 07:59:48 -0800 |
| commit | 500d7ec88652ba7316e7fba334754e39e3177e4a (patch) | |
| tree | f362da43ab39bd1a4611e7f65f4bc695effb48ae | |
| parent | 8ea1d2072ad1a9c24b326b50ebdc2c810c4b2cce (diff) | |
wifi: ath11k: mark ath11k_dp_rx_mon_mpdu_pop() as noinline
When compiling the ath11k driver using clang with KASAN enabled, the
following warning is observed:
drivers/net/wireless/ath/ath11k/dp_rx.c:5244:5: warning: stack frame size (1304) exceeds limit (1024) in 'ath11k_dp_rx_process_mon_status' [-Wframe-larger-than]
This is similar to the issue found in ath12k/qmi.c that was discussed
in [1] and fixed with [2]. The issue is that clang inlining can
explode stack usage.
ath11k_dp_rx_process_mon_status() itself is a pretty
lightweight function, but it dispatches to several other functions
which do the real work:
ath11k_dp_rx_process_mon_status()
ath11k_dp_rx_reap_mon_status_ring()
ath11k_dp_rx_mon_dest_process()
ath11k_dp_rx_mon_mpdu_pop() *
ath11k_dp_rx_mon_deliver()
ath11k_dp_rx_mon_merg_msdus()
ath11k_dp_rx_deliver_msdu()
ath11k_dp_rx_update_peer_stats()
Of these, only ath11k_dp_rx_mon_mpdu_pop() has non-trivial stack
usage, so mark that function as 'noinline_for_stack' to prevent it
from being inlined in ath11k_dp_rx_process_mon_status(), thereby
eliminating the excessive stack usage.
Compile tested only.
Link: https://msgid.link/bc214795-1c51-4cb7-922f-67d6ef98bff2@quicinc.com # [1]
Link: https://patch.msgid.link/20241028-ath12k_qmi_driver_event_work-v1-1-0d532eb593fa@quicinc.com # [2]
Acked-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20241119-ath11k-noinline-v1-2-4ec0a8aa30b2@quicinc.com
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/dp_rx.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index 238b0e5e92a0..8517994effce 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -4691,11 +4691,12 @@ static void ath11k_dp_mon_get_buf_len(struct hal_rx_msdu_desc_info *info, } } -static u32 -ath11k_dp_rx_mon_mpdu_pop(struct ath11k *ar, int mac_id, - void *ring_entry, struct sk_buff **head_msdu, - struct sk_buff **tail_msdu, u32 *npackets, - u32 *ppdu_id) +/* clang stack usage explodes if this is inlined */ +static noinline_for_stack +u32 ath11k_dp_rx_mon_mpdu_pop(struct ath11k *ar, int mac_id, + void *ring_entry, struct sk_buff **head_msdu, + struct sk_buff **tail_msdu, u32 *npackets, + u32 *ppdu_id) { struct ath11k_pdev_dp *dp = &ar->dp; struct ath11k_mon_data *pmon = (struct ath11k_mon_data *)&dp->mon_data; |