From b14365bea586f3796c11fbd21ea48b74dd94ecd2 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sat, 5 Jun 2021 13:46:03 +0200
Subject: [PATCH] mt76: mt7921: wake the device before dumping power table

Always wake the device up before dumping the single_sku power table
otherwise the device can hang.

Fixes: ea29acc97c555 ("mt76: mt7921: add dumping Tx power tabl")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 mt7921/debugfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mt7921/debugfs.c b/mt7921/debugfs.c
index b41d70be..c8cba182 100644
--- a/mt7921/debugfs.c
+++ b/mt7921/debugfs.c
@@ -184,7 +184,10 @@ mt7921_txpwr(struct seq_file *s, void *data)
 	struct mt7921_txpwr txpwr;
 	int ret;
 
+	mt7921_mutex_acquire(dev);
 	ret = mt7921_get_txpwr_info(dev, &txpwr);
+	mt7921_mutex_release(dev);
+
 	if (ret)
 		return ret;