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    Subject[PATCH 3.10 22/85] mwifiex: clean pcie ring only when device is present
    Date
    3.10-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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/mwifiex/wmm.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/drivers/net/wireless/mwifiex/wmm.c
    +++ b/drivers/net/wireless/mwifiex/wmm.c
    @@ -556,7 +556,8 @@ mwifiex_clean_txrx(struct mwifiex_privat
    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);
    }



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