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net: stmmac: Handle different error codes from platform_get_irq_byname

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The following patch moved device tree interrupt resolution into
platform_get_irq_byname:

  ad69674 of/irq: do irq resolution in platform_get_irq_byname()

As a result, the function no longer only return -ENXIO on error.
This breaks DT based probing of stmmac, as seen in test runs of
linux-next next-20140526 cubie2-sunxi_defconfig:

  http://lists.linaro.org/pipermail/kernel-build-reports/2014-May/003659.html

This patch makes the stmmac_platform probe function properly handle
error codes, such as returning for deferred probing, and other codes
returned by of_irq_get_by_name.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chen-Yu Tsai 2014-05-29 22:31:40 +08:00 committed by David S. Miller
parent 31595de219
commit d7ec858413
2 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -1753,7 +1753,7 @@ static int stmmac_open(struct net_device *dev)
}
/* Request the IRQ lines */
if (priv->lpi_irq != -ENXIO) {
if (priv->lpi_irq > 0) {
ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED,
dev->name, dev);
if (unlikely(ret < 0)) {
@ -1813,7 +1813,7 @@ static int stmmac_release(struct net_device *dev)
free_irq(dev->irq, dev);
if (priv->wol_irq != dev->irq)
free_irq(priv->wol_irq, dev);
if (priv->lpi_irq != -ENXIO)
if (priv->lpi_irq > 0)
free_irq(priv->lpi_irq, dev);
/* Stop TX/RX DMA and clear the descriptors */

17
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -237,10 +237,12 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
/* Get the MAC information */
priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
if (priv->dev->irq == -ENXIO) {
pr_err("%s: ERROR: MAC IRQ configuration "
"information not found\n", __func__);
return -ENXIO;
if (priv->dev->irq < 0) {
if (priv->dev->irq != -EPROBE_DEFER) {
netdev_err(priv->dev,
"MAC IRQ configuration information not found\n");
}
return priv->dev->irq;
}
/*
@ -252,10 +254,15 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
* so the driver will continue to use the mac irq (ndev->irq)
*/
priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
if (priv->wol_irq == -ENXIO)
if (priv->wol_irq < 0) {
if (priv->wol_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
priv->wol_irq = priv->dev->irq;
}
priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
if (priv->lpi_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
platform_set_drvdata(pdev, priv->dev);