Make sure to resume the platform device to enable clocks before
accessing the CPSW registers in the probe error path (e.g. for deferred
probe).
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)
Note that in the unlikely event of a runtime-resume failure, we'll leak
the ale struct.
Fixes: df828598a755 ("netdev: driver: ethernet: Add TI CPSW driver")
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
drivers/net/ethernet/ti/cpsw.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index c6cff3d2ff05..5bc5e6189661 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -2818,7 +2818,12 @@ static int cpsw_probe(struct platform_device *pdev)
return 0;
clean_ale_ret:
- cpsw_ale_destroy(cpsw->ale);
+ if (pm_runtime_get_sync(&pdev->dev) < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
+ } else {
+ cpsw_ale_destroy(cpsw->ale);
+ pm_runtime_put_sync(&pdev->dev);
+ }
clean_dma_ret:
cpdma_ctlr_destroy(cpsw->dma);
clean_runtime_disable_ret:
--
2.7.3
