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dpaa2-ptp: defer probe when portal allocation failed

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[ Upstream commit 5500598abb ]

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>
This commit is contained in:
Ioana Ciornei
2018-11-09 15:26:46 +00:00
committed by Greg Kroah-Hartman
parent 4ee24ae83c
commit 3a11ec548c
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/fsl-dpaa2/rtc/rtc.c
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@@ -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;
}