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net: ethernet: ti: cpdma: correct error handling for chan create 

It's not correct to return NULL when that is actually an error and
function returns errors in any other wrong case. In the same time,
the cpsw driver and davinci emac doesn't check error case while
creating channel and it can miss actual error. Also remove WARNs
replacing them on dev_err msgs.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Khoronzhuk 2017-12-12 23:06:35 +02:00 committed by David S. Miller
parent f56ec6766d
commit 8a83c5d796
3 changed files with 19 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/ti/cpsw.c
View File

@ -3065,10 +3065,16 @@ static int cpsw_probe(struct platform_device *pdev)
}
cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_tx_handler, 0);
if (IS_ERR(cpsw->txv[0].ch)) {
dev_err(priv->dev, "error initializing tx dma channel\n");
ret = PTR_ERR(cpsw->txv[0].ch);
goto clean_dma_ret;
}
cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
if (WARN_ON(!cpsw->rxv[0].ch || !cpsw->txv[0].ch)) {
dev_err(priv->dev, "error initializing dma channels\n");
ret = -ENOMEM;
if (IS_ERR(cpsw->rxv[0].ch)) {
dev_err(priv->dev, "error initializing rx dma channel\n");
ret = PTR_ERR(cpsw->rxv[0].ch);
goto clean_dma_ret;
}

2
drivers/net/ethernet/ti/davinci_cpdma.c
View File

@ -893,7 +893,7 @@ struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num,
chan_num = rx_type ? rx_chan_num(chan_num) : tx_chan_num(chan_num);
if (__chan_linear(chan_num) >= ctlr->num_chan)
return NULL;
return ERR_PTR(-EINVAL);
chan = devm_kzalloc(ctlr->dev, sizeof(*chan), GFP_KERNEL);
if (!chan)

11
drivers/net/ethernet/ti/davinci_emac.c
View File

@ -1870,10 +1870,17 @@ static int davinci_emac_probe(struct platform_device *pdev)
priv->txchan = cpdma_chan_create(priv->dma, EMAC_DEF_TX_CH,
emac_tx_handler, 0);
if (IS_ERR(priv->txchan)) {
dev_err(&pdev->dev, "error initializing tx dma channel\n");
rc = PTR_ERR(priv->txchan);
goto no_cpdma_chan;
}
priv->rxchan = cpdma_chan_create(priv->dma, EMAC_DEF_RX_CH,
emac_rx_handler, 1);
if (WARN_ON(!priv->txchan || !priv->rxchan)) {
rc = -ENOMEM;
if (IS_ERR(priv->rxchan)) {
dev_err(&pdev->dev, "error initializing rx dma channel\n");
rc = PTR_ERR(priv->rxchan);
goto no_cpdma_chan;
}