dpaa_eth: defer probing after qbman

If the DPAA 1 Ethernet driver gets probed before the QBMan driver it will
cause a boot crash. Add predictability in the probing order by deferring
the Ethernet driver probe after QBMan and portals by using the recently
introduced QBMan APIs.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index b4b82b9..75eeb2e 100644 (file)
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -2773,6 +2773,37 @@ static int dpaa_eth_probe(struct platform_device *pdev)
        int err = 0, i, channel;
        struct device *dev;
 
+       err = bman_is_probed();
+       if (!err)
+               return -EPROBE_DEFER;
+       if (err < 0) {
+               dev_err(&pdev->dev, "failing probe due to bman probe error\n");
+               return -ENODEV;
+       }
+       err = qman_is_probed();
+       if (!err)
+               return -EPROBE_DEFER;
+       if (err < 0) {
+               dev_err(&pdev->dev, "failing probe due to qman probe error\n");
+               return -ENODEV;
+       }
+       err = bman_portals_probed();
+       if (!err)
+               return -EPROBE_DEFER;
+       if (err < 0) {
+               dev_err(&pdev->dev,
+                       "failing probe due to bman portals probe error\n");
+               return -ENODEV;
+       }
+       err = qman_portals_probed();
+       if (!err)
+               return -EPROBE_DEFER;
+       if (err < 0) {
+               dev_err(&pdev->dev,
+                       "failing probe due to qman portals probe error\n");
+               return -ENODEV;
+       }
+
        /* device used for DMA mapping */
        dev = pdev->dev.parent;
        err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(40));