diff mbox series

[3/4] usb: dwc2: fix call to vbus supply exit routine, call it unlocked

Message ID 1536147605-26279-4-git-send-email-amelie.delaunay@st.com (mailing list archive)
State New, archived
Headers show
Series usb: dwc2: fix host mode external vbus supply management | expand

Commit Message

Amelie Delaunay Sept. 5, 2018, 11:40 a.m. UTC 
From: Fabrice Gasnier <fabrice.gasnier@st.com>

dwc2_vbus_supply_exit() may call regulator_disable(). It shouldn't be
called with interrupts disabled as it might sleep.
This is seen with DEBUG_ATOMIC_SLEEP=y.

Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external
vbus supply")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
---
 drivers/usb/dwc2/hcd.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index bb72517..e8a480e 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4484,7 +4484,9 @@  static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
 		hprt0 |= HPRT0_SUSP;
 		hprt0 &= ~HPRT0_PWR;
 		dwc2_writel(hsotg, hprt0, HPRT0);
+		spin_unlock_irqrestore(&hsotg->lock, flags);
 		dwc2_vbus_supply_exit(hsotg);
+		spin_lock_irqsave(&hsotg->lock, flags);
 	}
 
 	/* Enter partial_power_down */