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    Subject[PATCH 5.14 467/849] mt76: mt7921: always wake device if necessary in debugfs
    Date
    From: Lorenzo Bianconi <lorenzo@kernel.org>

    [ Upstream commit 569008744178b672ea3ad9047fa3098f1b73ca55 ]

    Add missing device wakeup in debugfs code if we are accessing chip
    registers.

    Fixes: 1d8efc741df8 ("mt76: mt7921: introduce Runtime PM support")
    Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
    Signed-off-by: Felix Fietkau <nbd@nbd.name>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
    index 4c89c4ac8031a..30f3b3085c786 100644
    --- a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
    +++ b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
    @@ -95,6 +95,8 @@ mt7921_tx_stats_show(struct seq_file *file, void *data)
    struct mt7921_dev *dev = file->private;
    int stat[8], i, n;

    + mt7921_mutex_acquire(dev);
    +
    mt7921_ampdu_stat_read_phy(&dev->phy, file);

    /* Tx amsdu info */
    @@ -104,6 +106,8 @@ mt7921_tx_stats_show(struct seq_file *file, void *data)
    n += stat[i];
    }

    + mt7921_mutex_release(dev);
    +
    for (i = 0; i < ARRAY_SIZE(stat); i++) {
    seq_printf(file, "AMSDU pack count of %d MSDU in TXD: 0x%x ",
    i + 1, stat[i]);
    @@ -124,6 +128,8 @@ mt7921_queues_acq(struct seq_file *s, void *data)
    struct mt7921_dev *dev = dev_get_drvdata(s->private);
    int i;

    + mt7921_mutex_acquire(dev);
    +
    for (i = 0; i < 16; i++) {
    int j, acs = i / 4, index = i % 4;
    u32 ctrl, val, qlen = 0;
    @@ -143,6 +149,8 @@ mt7921_queues_acq(struct seq_file *s, void *data)
    seq_printf(s, "AC%d%d: queued=%d\n", acs, index, qlen);
    }

    + mt7921_mutex_release(dev);
    +
    return 0;
    }

    --
    2.33.0


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