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dpaa2-eth: free already allocated channels on probe defer

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The setup_dpio() function tries to allocate a number of channels equal
to the number of CPUs online. When there are not enough DPCON objects
already probed, the function will return EPROBE_DEFER. When this
happens, the already allocated channels are not freed. This results in
the incapacity of properly probing the next time around.
Fix this by freeing the channels on the error path.

Fixes: d7f5a9d89a ("dpaa2-eth: defer probe on object allocate")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ioana Ciornei 2019-11-12 18:21:52 +02:00 committed by David S. Miller
parent 6d6dd528d5
commit 5aa4277d43
1 changed files with 9 additions and 1 deletions
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10
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
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@ -2232,8 +2232,16 @@ err_set_cdan:
err_service_reg:
free_channel(priv, channel);
err_alloc_ch:
if (err == -EPROBE_DEFER)
if (err == -EPROBE_DEFER) {
for (i = 0; i < priv->num_channels; i++) {
channel = priv->channel[i];
nctx = &channel->nctx;
dpaa2_io_service_deregister(channel->dpio, nctx, dev);
free_channel(priv, channel);
}
priv->num_channels = 0;
return err;
}
if (cpumask_empty(&priv->dpio_cpumask)) {
dev_err(dev, "No cpu with an affine DPIO/DPCON\n");