Make sure to keep the platform device runtime-resumed throughout probe
to avoid accessing the CPSW registers in the error path (e.g. for
deferred probe) with clocks disabled:
Unhandled fault: external abort on non-linefetch (0x1008) at 0xd0872d08
...
[<c04fabcc>] (cpsw_ale_control_set) from [<c04fb8b4>] (cpsw_ale_destroy+0x2c/0x44)
[<c04fb8b4>] (cpsw_ale_destroy) from [<c04fea58>] (cpsw_probe+0xbd0/0x10c4)
[<c04fea58>] (cpsw_probe) from [<c047b2a0>] (platform_drv_probe+0x5c/0xc0)
Fixes: df828598a755 ("netdev: driver: ethernet: Add TI CPSW driver")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
drivers/net/ethernet/ti/cpsw.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index c6cff3d2ff05..f60f8ab7c1e3 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -2641,13 +2641,12 @@ static int cpsw_probe(struct platform_device *pdev)
goto clean_runtime_disable_ret;
}
cpsw->version = readl(&cpsw->regs->id_ver);
- pm_runtime_put_sync(&pdev->dev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
cpsw->wr_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(cpsw->wr_regs)) {
ret = PTR_ERR(cpsw->wr_regs);
- goto clean_runtime_disable_ret;
+ goto clean_pm_runtime_put_ret;
}
memset(&dma_params, 0, sizeof(dma_params));
@@ -2684,7 +2683,7 @@ static int cpsw_probe(struct platform_device *pdev)
default:
dev_err(priv->dev, "unknown version 0x%08x\n", cpsw->version);
ret = -ENODEV;
- goto clean_runtime_disable_ret;
+ goto clean_pm_runtime_put_ret;
}
for (i = 0; i < cpsw->data.slaves; i++) {
struct cpsw_slave *slave = &cpsw->slaves[i];
@@ -2713,7 +2712,7 @@ static int cpsw_probe(struct platform_device *pdev)
if (!cpsw->dma) {
dev_err(priv->dev, "error initializing dma\n");
ret = -ENOMEM;
- goto clean_runtime_disable_ret;
+ goto clean_pm_runtime_put_ret;
}
cpsw->txch[0] = cpdma_chan_create(cpsw->dma, 0, cpsw_tx_handler, 0);
@@ -2815,12 +2814,16 @@ static int cpsw_probe(struct platform_device *pdev)
}
}
+ pm_runtime_put(&pdev->dev);
+
return 0;
clean_ale_ret:
cpsw_ale_destroy(cpsw->ale);
clean_dma_ret:
cpdma_ctlr_destroy(cpsw->dma);
+clean_pm_runtime_put_ret:
+ pm_runtime_put_sync(&pdev->dev);
clean_runtime_disable_ret:
pm_runtime_disable(&pdev->dev);
clean_ndev_ret:
--
2.7.3
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
