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    Subject[PATCH 4.4 111/190] qlcnic: Fix a sleep-in-atomic bug in qlcnic_82xx_hw_write_wx_2M and qlcnic_82xx_hw_read_wx_2M
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

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

    From: Jia-Ju Bai <baijiaju1990@163.com>


    [ Upstream commit 5ea6d691aac6c93b790f0905e3460d44cc4c449b ]

    The driver may sleep under a write spin lock, and the function
    call path is:
    qlcnic_82xx_hw_write_wx_2M (acquire the lock by write_lock_irqsave)
    crb_win_lock
    qlcnic_pcie_sem_lock
    usleep_range
    qlcnic_82xx_hw_read_wx_2M (acquire the lock by write_lock_irqsave)
    crb_win_lock
    qlcnic_pcie_sem_lock
    usleep_range

    To fix it, the usleep_range is replaced with udelay.

    Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
    +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c
    @@ -341,7 +341,7 @@ qlcnic_pcie_sem_lock(struct qlcnic_adapt
    }
    return -EIO;
    }
    - usleep_range(1000, 1500);
    + udelay(1200);
    }

    if (id_reg)

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