mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 22:47:56 +00:00
104 lines
3.7 KiB
Diff
104 lines
3.7 KiB
Diff
|
From: Lorenzo Bianconi <lorenzo@kernel.org>
|
||
|
|
Date: Thu, 1 Dec 2022 16:26:53 +0100
|
||
|
|
Subject: [PATCH] net: ethernet: mtk_wed: fix sleep while atomic in
|
||
|
|
mtk_wed_wo_queue_refill
|
||
|
|
|
||
|
|
In order to fix the following sleep while atomic bug always alloc pages
|
||
|
|
with GFP_ATOMIC in mtk_wed_wo_queue_refill since page_frag_alloc runs in
|
||
|
|
spin_lock critical section.
|
||
|
|
|
||
|
|
[ 9.049719] Hardware name: MediaTek MT7986a RFB (DT)
|
||
|
|
[ 9.054665] Call trace:
|
||
|
|
[ 9.057096] dump_backtrace+0x0/0x154
|
||
|
|
[ 9.060751] show_stack+0x14/0x1c
|
||
|
|
[ 9.064052] dump_stack_lvl+0x64/0x7c
|
||
|
|
[ 9.067702] dump_stack+0x14/0x2c
|
||
|
|
[ 9.071001] ___might_sleep+0xec/0x120
|
||
|
|
[ 9.074736] __might_sleep+0x4c/0x9c
|
||
|
|
[ 9.078296] __alloc_pages+0x184/0x2e4
|
||
|
|
[ 9.082030] page_frag_alloc_align+0x98/0x1ac
|
||
|
|
[ 9.086369] mtk_wed_wo_queue_refill+0x134/0x234
|
||
|
|
[ 9.090974] mtk_wed_wo_init+0x174/0x2c0
|
||
|
|
[ 9.094881] mtk_wed_attach+0x7c8/0x7e0
|
||
|
|
[ 9.098701] mt7915_mmio_wed_init+0x1f0/0x3a0 [mt7915e]
|
||
|
|
[ 9.103940] mt7915_pci_probe+0xec/0x3bc [mt7915e]
|
||
|
|
[ 9.108727] pci_device_probe+0xac/0x13c
|
||
|
|
[ 9.112638] really_probe.part.0+0x98/0x2f4
|
||
|
|
[ 9.116807] __driver_probe_device+0x94/0x13c
|
||
|
|
[ 9.121147] driver_probe_device+0x40/0x114
|
||
|
|
[ 9.125314] __driver_attach+0x7c/0x180
|
||
|
|
[ 9.129133] bus_for_each_dev+0x5c/0x90
|
||
|
|
[ 9.132953] driver_attach+0x20/0x2c
|
||
|
|
[ 9.136513] bus_add_driver+0x104/0x1fc
|
||
|
|
[ 9.140333] driver_register+0x74/0x120
|
||
|
|
[ 9.144153] __pci_register_driver+0x40/0x50
|
||
|
|
[ 9.148407] mt7915_init+0x5c/0x1000 [mt7915e]
|
||
|
|
[ 9.152848] do_one_initcall+0x40/0x25c
|
||
|
|
[ 9.156669] do_init_module+0x44/0x230
|
||
|
|
[ 9.160403] load_module+0x1f30/0x2750
|
||
|
|
[ 9.164135] __do_sys_init_module+0x150/0x200
|
||
|
|
[ 9.168475] __arm64_sys_init_module+0x18/0x20
|
||
|
|
[ 9.172901] invoke_syscall.constprop.0+0x4c/0xe0
|
||
|
|
[ 9.177589] do_el0_svc+0x48/0xe0
|
||
|
|
[ 9.180889] el0_svc+0x14/0x50
|
||
|
|
[ 9.183929] el0t_64_sync_handler+0x9c/0x120
|
||
|
|
[ 9.188183] el0t_64_sync+0x158/0x15c
|
||
|
|
|
||
|
|
Fixes: 799684448e3e ("net: ethernet: mtk_wed: introduce wed wo support")
|
||
|
|
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
|
||
|
|
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
|
||
|
|
Link: https://lore.kernel.org/r/67ca94bdd3d9eaeb86e52b3050fbca0bcf7bb02f.1669908312.git.lorenzo@kernel.org
|
||
|
|
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
||
|
|
---
|
||
|
|
|
||
|
|
--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c
|
||
|
|
+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
|
||
|
|
@@ -133,17 +133,18 @@ mtk_wed_wo_dequeue(struct mtk_wed_wo *wo
|
||
|
|
|
||
|
|
static int
|
||
|
|
mtk_wed_wo_queue_refill(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q,
|
||
|
|
- gfp_t gfp, bool rx)
|
||
|
|
+ bool rx)
|
||
|
|
{
|
||
|
|
enum dma_data_direction dir = rx ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
||
|
|
int n_buf = 0;
|
||
|
|
|
||
|
|
spin_lock_bh(&q->lock);
|
||
|
|
while (q->queued < q->n_desc) {
|
||
|
|
- void *buf = page_frag_alloc(&q->cache, q->buf_size, gfp);
|
||
|
|
struct mtk_wed_wo_queue_entry *entry;
|
||
|
|
dma_addr_t addr;
|
||
|
|
+ void *buf;
|
||
|
|
|
||
|
|
+ buf = page_frag_alloc(&q->cache, q->buf_size, GFP_ATOMIC);
|
||
|
|
if (!buf)
|
||
|
|
break;
|
||
|
|
|
||
|
|
@@ -215,7 +216,7 @@ mtk_wed_wo_rx_run_queue(struct mtk_wed_w
|
||
|
|
mtk_wed_mcu_rx_unsolicited_event(wo, skb);
|
||
|
|
}
|
||
|
|
|
||
|
|
- if (mtk_wed_wo_queue_refill(wo, q, GFP_ATOMIC, true)) {
|
||
|
|
+ if (mtk_wed_wo_queue_refill(wo, q, true)) {
|
||
|
|
u32 index = (q->head - 1) % q->n_desc;
|
||
|
|
|
||
|
|
mtk_wed_wo_queue_kick(wo, q, index);
|
||
|
|
@@ -432,7 +433,7 @@ mtk_wed_wo_hardware_init(struct mtk_wed_
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
- mtk_wed_wo_queue_refill(wo, &wo->q_tx, GFP_KERNEL, false);
|
||
|
|
+ mtk_wed_wo_queue_refill(wo, &wo->q_tx, false);
|
||
|
|
mtk_wed_wo_queue_reset(wo, &wo->q_tx);
|
||
|
|
|
||
|
|
regs.desc_base = MTK_WED_WO_CCIF_DUMMY5;
|
||
|
|
@@ -446,7 +447,7 @@ mtk_wed_wo_hardware_init(struct mtk_wed_
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
- mtk_wed_wo_queue_refill(wo, &wo->q_rx, GFP_KERNEL, true);
|
||
|
|
+ mtk_wed_wo_queue_refill(wo, &wo->q_rx, true);
|
||
|
|
mtk_wed_wo_queue_reset(wo, &wo->q_rx);
|
||
|
|
|
||
|
|
/* rx queue irqmask */
|