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Merge branch 'dpaa2-eth-defer-probe-on-object-allocate'

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Ioana Ciornei says:

====================
dpaa2-eth: defer probe on object allocate

Allocatable objects on the fsl-mc bus may be probed by the fsl_mc_allocator
after the first attempts of other drivers to use them. Defer the probe when
this situation happens.

Changes in v2:
  - proper handling of IS_ERR_OR_NULL
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-11-09 20:08:59 -08:00
commit a4bec00b28
2 changed files with 26 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
View File

@ -1434,8 +1434,11 @@ static struct fsl_mc_device *setup_dpcon(struct dpaa2_eth_priv *priv)
err = fsl_mc_object_allocate(to_fsl_mc_device(dev),
FSL_MC_POOL_DPCON, &dpcon);
if (err) {
dev_info(dev, "Not enough DPCONs, will go on as-is\n");
return NULL;
if (err == -ENXIO)
err = -EPROBE_DEFER;
else
dev_info(dev, "Not enough DPCONs, will go on as-is\n");
return ERR_PTR(err);
}
err = dpcon_open(priv->mc_io, 0, dpcon->obj_desc.id, &dpcon->mc_handle);
@ -1493,8 +1496,10 @@ alloc_channel(struct dpaa2_eth_priv *priv)
return NULL;
channel->dpcon = setup_dpcon(priv);
if (!channel->dpcon)
if (IS_ERR_OR_NULL(channel->dpcon)) {
err = PTR_ERR(channel->dpcon);
goto err_setup;
}
err = dpcon_get_attributes(priv->mc_io, 0, channel->dpcon->mc_handle,
&attr);
@ -1513,7 +1518,7 @@ alloc_channel(struct dpaa2_eth_priv *priv)
free_dpcon(priv, channel->dpcon);
err_setup:
kfree(channel);
return NULL;
return ERR_PTR(err);
}
static void free_channel(struct dpaa2_eth_priv *priv,
@ -1547,10 +1552,11 @@ static int setup_dpio(struct dpaa2_eth_priv *priv)
for_each_online_cpu(i) {
/* Try to allocate a channel */
channel = alloc_channel(priv);
if (!channel) {
dev_info(dev,
"No affine channel for cpu %d and above\n", i);
err = -ENODEV;
if (IS_ERR_OR_NULL(channel)) {
err = PTR_ERR(channel);
if (err != -EPROBE_DEFER)
dev_info(dev,
"No affine channel for cpu %d and above\n", i);
goto err_alloc_ch;
}
@ -1608,9 +1614,12 @@ static int setup_dpio(struct dpaa2_eth_priv *priv)
err_service_reg:
free_channel(priv, channel);
err_alloc_ch:
if (err == -EPROBE_DEFER)
return err;
if (cpumask_empty(&priv->dpio_cpumask)) {
dev_err(dev, "No cpu with an affine DPIO/DPCON\n");
return err;
return -ENODEV;
}
dev_info(dev, "Cores %*pbl available for processing ingress traffic\n",
@ -1732,7 +1741,10 @@ static int setup_dpbp(struct dpaa2_eth_priv *priv)
err = fsl_mc_object_allocate(to_fsl_mc_device(dev), FSL_MC_POOL_DPBP,
&dpbp_dev);
if (err) {
dev_err(dev, "DPBP device allocation failed\n");
if (err == -ENXIO)
err = -EPROBE_DEFER;
else
dev_err(dev, "DPBP device allocation failed\n");
return err;
}

5
drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c
View File

@ -140,7 +140,10 @@ static int dpaa2_ptp_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;
}