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staging: fsl-dpaa2/eth: Defer probing if no MC portal available 

MC portals may not be available at the initial probing attempt
due to dependencies on other modules.

Check the return value of the MC portal allocation function and
defer probing in case it's not available yet. For all other error
cases the behaviour stays the same.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Suggested-by: Nipun Gupta <nipun.gupta@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ioana Radulescu 2018-03-20 07:04:46 -05:00 committed by Greg Kroah-Hartman
parent d59578da2b
commit 8c3696102f
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
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@ -2441,7 +2441,10 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev)
err = fsl_mc_portal_allocate(dpni_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
&priv->mc_io);
if (err) {
dev_err(dev, "MC portal allocation failed\n");
if (err == -ENXIO)
err = -EPROBE_DEFER;
else
dev_err(dev, "MC portal allocation failed\n");
goto err_portal_alloc;
}