4.19-stable review patch. If anyone has any objections, please let me know.
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[ 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; }