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    Subject[PATCH AUTOSEL 4.19 032/258] dpaa2-ptp: defer probe when portal allocation failed
    Date
    From: Ioana Ciornei <ioana.ciornei@nxp.com>

    [ Upstream commit 5500598abbfb5b46201b9768bd9ea873a5eeaece ]

    The fsl_mc_portal_allocate can fail when the requested MC portals are
    not yet probed by the fsl_mc_allocator. In this situation, the driver
    should defer the probe.

    Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/staging/fsl-dpaa2/rtc/rtc.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    diff --git a/drivers/staging/fsl-dpaa2/rtc/rtc.c b/drivers/staging/fsl-dpaa2/rtc/rtc.c
    index 0d52cb85441f..318a33c2f7a7 100644
    --- a/drivers/staging/fsl-dpaa2/rtc/rtc.c
    +++ b/drivers/staging/fsl-dpaa2/rtc/rtc.c
    @@ -142,7 +142,10 @@ static int rtc_probe(struct fsl_mc_device *mc_dev)

    err = fsl_mc_portal_allocate(mc_dev, 0, &mc_dev->mc_io);
    if (err) {
    - dev_err(dev, "fsl_mc_portal_allocate err %d\n", err);
    + if (err == -ENXIO)
    + err = -EPROBE_DEFER;
    + else
    + dev_err(dev, "fsl_mc_portal_allocate err %d\n", err);
    goto err_exit;
    }

    --
    2.19.1
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