This patch fixes an issue that this driver causes panic if a gadget
driver is already loaded because usb_add_gadget_udc() might call
renesas_usb3_start() via .udc_start, and then pm_runtime_get_sync()
in renesas_usb3_start() doesn't work correctly.
Note that the usb3_to_dev() macro should not be called at this timing
because the macro uses the gadget structure.
Fixes: cf06df3fae28 ("usb: gadget: udc: renesas_usb3: move pm_runtime_{en,dis}able()")
Cc: <stable@xxxxxxxxxxxxxxx> # v4.15+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
---
Changes from v1:
- Add Reviewed-by.
drivers/usb/gadget/udc/renesas_usb3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c
index 1c54a77..738b734 100644
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -2632,6 +2632,7 @@ static int renesas_usb3_probe(struct platform_device *pdev)
if (ret < 0)
goto err_alloc_prd;
+ pm_runtime_enable(&pdev->dev);
ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
if (ret < 0)
goto err_add_udc;
@@ -2653,7 +2654,6 @@ static int renesas_usb3_probe(struct platform_device *pdev)
renesas_usb3_debugfs_init(usb3, &pdev->dev);
dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : "");
- pm_runtime_enable(usb3_to_dev(usb3));
return 0;
--
1.9.1
