From: Sean Wang <sean.wang@xxxxxxxxxxxx>
dma init should be done when dma have been allocated
[ 2.361127] BUG: spinlock bad magic on CPU#0, modprobe/456
[ 2.361583] lock: 0xffffa1287525b3b8, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
[ 2.362250] CPU: 0 PID: 456 Comm: modprobe Not tainted 4.14.177 #5
[ 2.362751] Hardware name: HP Meep/Meep, BIOS Google_Meep.11297.75.0 06/17/2019
[ 2.363343] Call Trace:
[ 2.363552] dump_stack+0x97/0xdb
[ 2.363826] ? spin_bug+0xa6/0xb3
[ 2.364096] do_raw_spin_lock+0x6a/0x9a
[ 2.364417] mt76_dma_rx_fill+0x44/0x1de [mt76]
[ 2.364787] ? mt76_dma_kick_queue+0x18/0x18 [mt76]
[ 2.365184] mt76_dma_init+0x53/0x85 [mt76]
[ 2.365532] mt7615_dma_init+0x3d7/0x546 [mt7615e]
[ 2.365928] mt7615_register_device+0xe6/0x1a0 [mt7615e]
[ 2.366364] mt7615_mmio_probe+0x14b/0x171 [mt7615e]
[ 2.366771] mt7615_pci_probe+0x118/0x13b [mt7615e]
[ 2.367169] pci_device_probe+0xaf/0x13d
[ 2.367491] driver_probe_device+0x284/0x2ca
[ 2.367840] __driver_attach+0x7a/0x9e
[ 2.368146] ? driver_attach+0x1f/0x1f
[ 2.368451] bus_for_each_dev+0xa0/0xdb
[ 2.368765] bus_add_driver+0x132/0x204
[ 2.369078] driver_register+0x8e/0xcd
[ 2.369384] do_one_initcall+0x160/0x257
[ 2.369706] ? 0xffffffffc0240000
[ 2.369980] do_init_module+0x60/0x1bb
[ 2.370286] load_module+0x18c2/0x1a2b
[ 2.370596] ? kernel_read_file+0x141/0x1b9
[ 2.370937] ? kernel_read_file_from_fd+0x46/0x71
[ 2.371320] SyS_finit_module+0xcc/0xf0
[ 2.371636] do_syscall_64+0x6b/0xf7
[ 2.371930] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 2.372344] RIP: 0033:0x7da218ae4199
[ 2.372637] RSP: 002b:00007fffd0608398 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 2.373252] RAX: ffffffffffffffda RBX: 00005a705449df90 RCX: 00007da218ae4199
[ 2.373833] RDX: 0000000000000000 RSI: 00005a7052e73bd8 RDI: 0000000000000006
[ 2.374411] RBP: 00007fffd06083e0 R08: 0000000000000000 R09: 00005a705449d540
[ 2.374989] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
[ 2.375569] R13: 00005a705449def0 R14: 00005a7052e73bd8 R15: 0000000000000000
Fixes: d3377b78cec6 ("mt76: add HE phy modes and hardware queue")
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 75e659774e07..eca39799f050 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -576,7 +576,7 @@ mt76_dma_init(struct mt76_dev *dev)
init_dummy_netdev(&dev->napi_dev);
- for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++) {
+ for (i = 0; i < ARRAY_SIZE(dev->q_rx) && dev->q_rx[i].desc; i++) {
netif_napi_add(&dev->napi_dev, &dev->napi[i], mt76_dma_rx_poll,
64);
mt76_dma_rx_fill(dev, &dev->q_rx[i]);
--
2.25.1
