From: Carl Huang <cjhuang@xxxxxxxxxxxxxx>
Fix warning caused by lockdep_assert_held when CONFIG_LOCKDEP is enabled.
[ 271.940647] WARNING: CPU: 6 PID: 0 at drivers/net/wireless/ath/ath11k/hal.c:818 ath11k_hal_srng_access_begin+0x31/0x40 [ath11k]
[ 271.940655] Modules linked in: qrtr_mhi qrtr ns ath11k_pci mhi ath11k qmi_helpers nvme nvme_core
[ 271.940675] CPU: 6 PID: 0 Comm: swapper/6 Kdump: loaded Tainted: G W 5.9.0-rc5-kalle-bringup-wt-ath+ #4
[ 271.940682] Hardware name: Dell Inc. Inspiron 7590/08717F, BIOS 1.3.0 07/22/2019
[ 271.940698] RIP: 0010:ath11k_hal_srng_access_begin+0x31/0x40 [ath11k]
[ 271.940708] Code: 48 89 f3 85 c0 75 11 48 8b 83 a8 00 00 00 8b 00 89 83 b0 00 00 00 5b c3 48 8d 7e 58 be ff ff ff ff e8 53 24 ec fa 85 c0 75 dd <0f> 0b eb d9 90 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 8b 35
[ 271.940718] RSP: 0018:ffffbdf0c0230df8 EFLAGS: 00010246
[ 271.940727] RAX: 0000000000000000 RBX: ffffa12b34e67680 RCX: ffffa12b57a0d800
[ 271.940735] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffa12b34e676d8
[ 271.940742] RBP: ffffa12b34e60000 R08: 0000000000000001 R09: 0000000000000001
[ 271.940753] R10: 0000000000000001 R11: 0000000000000046 R12: 0000000000000000
[ 271.940763] R13: ffffa12b34e60000 R14: ffffa12b34e60000 R15: 0000000000000000
[ 271.940774] FS: 0000000000000000(0000) GS:ffffa12b5a400000(0000) knlGS:0000000000000000
[ 271.940788] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 271.940798] CR2: 00007f8bef282008 CR3: 00000001f4224004 CR4: 00000000003706e0
[ 271.940805] Call Trace:
[ 271.940813] <IRQ>
[ 271.940835] ath11k_dp_tx_completion_handler+0x9e/0x950 [ath11k]
[ 271.940847] ? lock_acquire+0xba/0x3b0
[ 271.940876] ath11k_dp_service_srng+0x5a/0x2e0 [ath11k]
[ 271.940893] ath11k_pci_ext_grp_napi_poll+0x1e/0x80 [ath11k_pci]
[ 271.940908] net_rx_action+0x283/0x4f0
[ 271.940931] __do_softirq+0xcb/0x499
[ 271.940950] asm_call_on_stack+0x12/0x20
[ 271.940963] </IRQ>
[ 271.940979] do_softirq_own_stack+0x4d/0x60
[ 271.940991] irq_exit_rcu+0xb0/0xc0
[ 271.941001] common_interrupt+0xce/0x190
[ 271.941014] asm_common_interrupt+0x1e/0x40
[ 271.941026] RIP: 0010:cpuidle_enter_state+0x115/0x500
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Carl Huang <cjhuang@xxxxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath11k/dp_tx.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/ath/ath11k/dp_tx.c b/drivers/net/wireless/ath/ath11k/dp_tx.c
index e907a8555583..d329ff75221b 100644
--- a/drivers/net/wireless/ath/ath11k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_tx.c
@@ -536,6 +536,8 @@ void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id)
u32 msdu_id;
u8 mac_id;
+ spin_lock_bh(&status_ring->lock);
+
ath11k_hal_srng_access_begin(ab, status_ring);
while ((ATH11K_TX_COMPL_NEXT(tx_ring->tx_status_head) !=
@@ -555,6 +557,8 @@ void ath11k_dp_tx_completion_handler(struct ath11k_base *ab, int ring_id)
ath11k_hal_srng_access_end(ab, status_ring);
+ spin_unlock_bh(&status_ring->lock);
+
while (ATH11K_TX_COMPL_NEXT(tx_ring->tx_status_tail) != tx_ring->tx_status_head) {
struct hal_wbm_release_ring *tx_status;
u32 desc_id;
--
2.7.4
