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    SubjectRe: [patch 07/30] bcm43xx: Drain TX status before starting IRQs
    Chris Wright wrote:
    > -stable review patch. If anyone has any objections, please let us know.
    > ------------------
    >
    > From: Michael Buesch <mb@bu3sch.de>
    >
    > Drain the Microcode TX-status-FIFO before we enable IRQs.
    > This is required, because the FIFO may still have entries left
    > from a previous run. Those would immediately fire after enabling
    > IRQs and would lead to an oops in the DMA TXstatus handling code.
    >
    > Cc: "John W. Linville" <linville@tuxdriver.com>
    > Signed-off-by: Michael Buesch <mb@bu3sch.de>
    > Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
    > Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    > ---

    Chris,

    The regression turns out to be a locking problem involving bcm43xx, wpa_supplicant, and
    NetworkManager. The exact cause is unknown; however, this patch is clearly not the problem. Please
    reinstate it for inclusion in -stable.

    Thanks,

    Larry


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