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    Subject[PATCH 3.11 008/144] mwifiex: clean pcie ring only when device is present
    Date
    3.11.10.7 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Avinash Patil <patila@marvell.com>

    commit 4f7ba432202c8330cc03ab959c6228d0de5dc4a3 upstream.

    Write io memory to clean PCIe buffer only when PCIe device is
    present else this results into crash because of invalid memory
    access.

    Signed-off-by: Avinash Patil <patila@marvell.com>
    Signed-off-by: Bing Zhao <bzhao@marvell.com>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
    ---
    drivers/net/wireless/mwifiex/wmm.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
    index fbf0915..03877ec 100644
    --- a/drivers/net/wireless/mwifiex/wmm.c
    +++ b/drivers/net/wireless/mwifiex/wmm.c
    @@ -559,7 +559,8 @@ mwifiex_clean_txrx(struct mwifiex_private *priv)
    mwifiex_wmm_delete_all_ralist(priv);
    memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));

    - if (priv->adapter->if_ops.clean_pcie_ring)
    + if (priv->adapter->if_ops.clean_pcie_ring &&
    + !priv->adapter->surprise_removed)
    priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
    spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
    }
    --
    1.9.1


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