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authorLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>2021-12-24 19:26:26 +0000
committerDavid S. Miller <davem@davemloft.net>2021-12-27 12:22:19 +0000
commit32f52e8e78d3350e3e74985b0314ba15cea3bc8d (patch)
tree5df0e56806a844f67c20bdf90aab6399ba350b22 /drivers/net/ethernet/ti
parent7801302b9a01ff69fd33d53a7601da1e9bacde2f (diff)
downloadlinux-32f52e8e78d3350e3e74985b0314ba15cea3bc8d.tar.bz2
net: ethernet: ti: davinci_emac: Use platform_get_irq() to get the interrupt
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static allocation of IRQ resources in DT core code, this causes an issue when using hierarchical interrupt domains using "interrupts" property in the node as this bypasses the hierarchical setup and messes up the irq chaining. In preparation for removal of static setup of IRQ resource from DT core code use platform_get_irq() for DT users only. While at it propagate error code in case request_irq() fails instead of returning -EBUSY. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/ti')
-rw-r--r--drivers/net/ethernet/ti/davinci_emac.c69
1 files changed, 42 insertions, 27 deletions
diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index d55f06120ce7..31df3267a01a 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1454,23 +1454,33 @@ static int emac_dev_open(struct net_device *ndev)
}
/* Request IRQ */
- while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ,
- res_num))) {
- for (irq_num = res->start; irq_num <= res->end; irq_num++) {
- if (request_irq(irq_num, emac_irq, 0, ndev->name,
- ndev)) {
- dev_err(emac_dev,
- "DaVinci EMAC: request_irq() failed\n");
- ret = -EBUSY;
+ if (dev_of_node(&priv->pdev->dev)) {
+ while ((ret = platform_get_irq_optional(priv->pdev, res_num)) != -ENXIO) {
+ if (ret < 0)
+ goto rollback;
+ ret = request_irq(ret, emac_irq, 0, ndev->name, ndev);
+ if (ret) {
+ dev_err(emac_dev, "DaVinci EMAC: request_irq() failed\n");
goto rollback;
}
+ res_num++;
}
- res_num++;
+ } else {
+ while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, res_num))) {
+ for (irq_num = res->start; irq_num <= res->end; irq_num++) {
+ ret = request_irq(irq_num, emac_irq, 0, ndev->name, ndev);
+ if (ret) {
+ dev_err(emac_dev, "DaVinci EMAC: request_irq() failed\n");
+ goto rollback;
+ }
+ }
+ res_num++;
+ }
+ /* prepare counters for rollback in case of an error */
+ res_num--;
+ irq_num--;
}
- /* prepare counters for rollback in case of an error */
- res_num--;
- irq_num--;
/* Start/Enable EMAC hardware */
emac_hw_enable(priv);
@@ -1554,16 +1564,24 @@ err:
napi_disable(&priv->napi);
rollback:
- for (q = res_num; q >= 0; q--) {
- res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, q);
- /* at the first iteration, irq_num is already set to the
- * right value
- */
- if (q != res_num)
- irq_num = res->end;
+ if (dev_of_node(&priv->pdev->dev)) {
+ for (q = res_num - 1; q >= 0; q--) {
+ irq_num = platform_get_irq(priv->pdev, q);
+ if (irq_num > 0)
+ free_irq(irq_num, ndev);
+ }
+ } else {
+ for (q = res_num; q >= 0; q--) {
+ res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, q);
+ /* at the first iteration, irq_num is already set to the
+ * right value
+ */
+ if (q != res_num)
+ irq_num = res->end;
- for (m = irq_num; m >= res->start; m--)
- free_irq(m, ndev);
+ for (m = irq_num; m >= res->start; m--)
+ free_irq(m, ndev);
+ }
}
cpdma_ctlr_stop(priv->dma);
pm_runtime_put(&priv->pdev->dev);
@@ -1899,13 +1917,10 @@ static int davinci_emac_probe(struct platform_device *pdev)
goto err_free_txchan;
}
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res) {
- dev_err(&pdev->dev, "error getting irq res\n");
- rc = -ENOENT;
+ rc = platform_get_irq(pdev, 0);
+ if (rc < 0)
goto err_free_rxchan;
- }
- ndev->irq = res->start;
+ ndev->irq = rc;
rc = davinci_emac_try_get_mac(pdev, res_ctrl ? 0 : 1, priv->mac_addr);
if (!rc)