You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.8 KiB
55 lines
1.8 KiB
From 438fea2a6325933868aebc20279e2669c9a21207 Mon Sep 17 00:00:00 2001
|
|
From: Tomeu Vizoso <tomeu.vizoso@collabora.com>
|
|
Date: Mon, 26 Mar 2018 11:00:01 +0200
|
|
Subject: [PATCH] usb: dwc2: dwc2_vbus_supply_init: fix error check
|
|
|
|
devm_regulator_get_optional returns -ENODEV if the regulator isn't
|
|
there, so if that's the case we have to make sure not to leave -ENODEV
|
|
in the regulator pointer.
|
|
|
|
Also, make sure we return 0 in that case, but correctly propagate any
|
|
other errors. Also propagate the error from _dwc2_hcd_start.
|
|
|
|
Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external vbus supply")
|
|
Cc: Amelie Delaunay <amelie.delaunay@st.com>
|
|
Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com>
|
|
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
|
|
Reviewed-by: Grigor Tovmasyan <tovmasya@synopsys.com>
|
|
Tested-by: Heiko Stuebner <heiko@sntech.de>
|
|
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
|
|
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
|
|
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
|
|
---
|
|
drivers/usb/dwc2/hcd.c | 13 ++++++++-----
|
|
1 file changed, 8 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/usb/dwc2/hcd.c
|
|
+++ b/drivers/usb/dwc2/hcd.c
|
|
@@ -361,9 +361,14 @@ static void dwc2_gusbcfg_init(struct dwc
|
|
|
|
static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg)
|
|
{
|
|
+ int ret;
|
|
+
|
|
hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");
|
|
- if (IS_ERR(hsotg->vbus_supply))
|
|
- return 0;
|
|
+ if (IS_ERR(hsotg->vbus_supply)) {
|
|
+ ret = PTR_ERR(hsotg->vbus_supply);
|
|
+ hsotg->vbus_supply = NULL;
|
|
+ return ret == -ENODEV ? 0 : ret;
|
|
+ }
|
|
|
|
return regulator_enable(hsotg->vbus_supply);
|
|
}
|
|
@@ -4474,9 +4479,7 @@ static int _dwc2_hcd_start(struct usb_hc
|
|
|
|
spin_unlock_irqrestore(&hsotg->lock, flags);
|
|
|
|
- dwc2_vbus_supply_init(hsotg);
|
|
-
|
|
- return 0;
|
|
+ return dwc2_vbus_supply_init(hsotg);
|
|
}
|
|
|
|
/*
|
|
|