From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Artur Petrosyan , Minas Harutyunyan , Fabrice Gasnier , Amelie Delaunay , Felipe Balbi , Sasha Levin Subject: [PATCH 4.19 158/361] usb: dwc2: fix call to vbus supply exit routine, call it unlocked Date: Sun, 11 Nov 2018 14:18:25 -0800 Message-Id: <20181111221642.688798207@linuxfoundation.org> In-Reply-To: <20181111221619.915519183@linuxfoundation.org> References: <20181111221619.915519183@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit List-ID: 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fabrice Gasnier [ Upstream commit 5aa678c7fd5371769efde30763fb43a43a118cd0 ] 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") Tested-by: Artur Petrosyan Acked-by: Minas Harutyunyan Signed-off-by: Fabrice Gasnier Signed-off-by: Amelie Delaunay Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc2/hcd.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4482,7 +4482,9 @@ static int _dwc2_hcd_suspend(struct usb_ 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 */