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    Subject[PATCH 3.2 081/221] drm/radeon: do a posting read in evergreen_set_irq
    3.2.69-rc1 review patch.  If anyone has any objections, please let me know.

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

    From: Alex Deucher <alexander.deucher@amd.com>

    commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 upstream.

    To make sure the writes go through the pci bridge.

    bug:
    https://bugzilla.kernel.org/show_bug.cgi?id=90741

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/gpu/drm/radeon/evergreen.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/gpu/drm/radeon/evergreen.c
    +++ b/drivers/gpu/drm/radeon/evergreen.c
    @@ -2631,6 +2631,9 @@ int evergreen_irq_set(struct radeon_devi
    WREG32(DC_HPD5_INT_CONTROL, hpd5);
    WREG32(DC_HPD6_INT_CONTROL, hpd6);

    + /* posting read */
    + RREG32(SRBM_STATUS);
    +
    return 0;
    }



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