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staging: fsl-dpaa2/eth: Defer probing if no DPIOs found

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If the Ethernet driver doesn't find any DPIO devices during probe,
it may be either because there's none available or because they
haven't been probed yet. Request deferred probing in case it's
the latter.

Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ioana Radulescu 2017-06-06 10:00:33 -05:00 committed by Greg Kroah-Hartman
parent d00defe30a
commit 5206d8d1d3
1 changed files with 7 additions and 3 deletions
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10
drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
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@ -1510,6 +1510,7 @@ static int setup_dpio(struct dpaa2_eth_priv *priv)
if (!channel) {
dev_info(dev,
"No affine channel for cpu %d and above\n", i);
err = -ENODEV;
goto err_alloc_ch;
}
@ -1524,10 +1525,13 @@ static int setup_dpio(struct dpaa2_eth_priv *priv)
/* Register the new context */
err = dpaa2_io_service_register(NULL, nctx);
if (err) {
dev_info(dev, "No affine DPIO for cpu %d\n", i);
dev_dbg(dev, "No affine DPIO for cpu %d\n", i);
/* If no affine DPIO for this core, there's probably
* none available for next cores either.
* none available for next cores either. Signal we want
* to retry later, in case the DPIO devices weren't
* probed yet.
*/
err = -EPROBE_DEFER;
goto err_service_reg;
}
@ -1565,7 +1569,7 @@ err_service_reg:
err_alloc_ch:
if (cpumask_empty(&priv->dpio_cpumask)) {
dev_err(dev, "No cpu with an affine DPIO/DPCON\n");
return -ENODEV;
return err;
}
dev_info(dev, "Cores %*pbl available for processing ingress traffic\n",