Send an undersized corrupt packet to the DMA queue, which causes the
firmware to issue a full chip reset
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
.../wireless/mediatek/mt76/mt7615/debugfs.c | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
index 158c0c183e9c..7d8e53ac51ef 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/debugfs.c
@@ -98,6 +98,28 @@ mt7615_fw_debug_get(void *data, u64 *val)
DEFINE_DEBUGFS_ATTRIBUTE(fops_fw_debug, mt7615_fw_debug_get,
mt7615_fw_debug_set, "%lld\n");
+static int
+mt7615_reset_test_set(void *data, u64 val)
+{
+ struct mt7615_dev *dev = data;
+ struct sk_buff *skb;
+
+ if (!mt7615_wait_for_mcu_init(dev))
+ return 0;
+
+ skb = alloc_skb(1, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, 1);
+ mt76_tx_queue_skb_raw(dev, 0, skb, 0);
+
+ return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_reset_test, NULL,
+ mt7615_reset_test_set, "%lld\n");
+
static int
mt7615_ampdu_stat_read(struct seq_file *file, void *data)
{
@@ -264,6 +286,8 @@ int mt7615_init_debugfs(struct mt7615_dev *dev)
&dev->radar_pattern.power);
debugfs_create_file("radar_trigger", 0200, dir, dev,
&fops_radar_pattern);
+ debugfs_create_file("reset_test", 0200, dir, dev,
+ &fops_reset_test);
debugfs_create_devm_seqfile(dev->mt76.dev, "temperature", dir,
mt7615_read_temperature);
--
2.24.0
