From 5aa4277d4368c099223bbcd3a9086f3351a12ce9 Mon Sep 17 00:00:00 2001 From: Ioana Ciornei Date: Tue, 12 Nov 2019 18:21:52 +0200 Subject: [PATCH] dpaa2-eth: free already allocated channels on probe defer 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: d7f5a9d89a55 ("dpaa2-eth: defer probe on object allocate") Signed-off-by: Ioana Ciornei Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c index 19379bae01443..bf5add9541818 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c @@ -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"); -- 2.30.2