| From 2b1c18a06ab12124b50b6ee45f7ec070071560d7 Mon Sep 17 00:00:00 2001 |
| From: "Henry.Yen" <henry.yen@mediatek.com> |
| Date: Tue, 16 Jan 2024 11:30:02 +0800 |
| Subject: [PATCH 17/17] mtk: wifi: mt76: mt7996: add sanity check for NAPI |
| schedule |
| |
| Add sanity check for NAPI schedule. |
| |
| It's observed that host driver might occasionally receive |
| interrupts from unexpected Rx ring, whose Rx NAPI hasn't been |
| prepared yet. Under such situation, __napi_poll crash issue |
| would occur, so we add sanity check to prevent it. |
| |
| If without this patch, we might encounter kernel crash issue |
| especially in WED-on & RRO-on software path. |
| |
| Signed-off-by: Henry.Yen <henry.yen@mediatek.com> |
| |
| --- |
| mt7996/mmio.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| diff --git a/mt7996/mmio.c b/mt7996/mmio.c |
| index 8fe56ed9..367a204d 100644 |
| --- a/mt7996/mmio.c |
| +++ b/mt7996/mmio.c |
| @@ -560,7 +560,7 @@ static void mt7996_irq_tasklet(struct tasklet_struct *t) |
| napi_schedule(&dev->mt76.tx_napi); |
| |
| for (i = 0; i < __MT_RXQ_MAX; i++) { |
| - if ((intr & MT_INT_RX(i))) |
| + if ((intr & MT_INT_RX(i)) && dev->mt76.napi[i].poll) |
| napi_schedule(&dev->mt76.napi[i]); |
| } |
| |
| -- |
| 2.18.0 |
| |