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Message-Id: <20190215020855.176727-12-sashal@kernel.org>
Date: Thu, 14 Feb 2019 21:07:50 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Bo He <bo.he@...el.com>, Yu Wang <yu.y.wang@...el.com>,
Felipe Balbi <felipe.balbi@...ux.intel.com>,
Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org
Subject: [PATCH AUTOSEL 4.20 12/77] usb: dwc3: gadget: synchronize_irq dwc irq in suspend
From: Bo He <bo.he@...el.com>
[ Upstream commit 01c10880d24291a96a4ab0da773e3c5ce4d12da8 ]
We see dwc3 endpoint stopped by unwanted irq during
suspend resume test, which is caused dwc3 ep can't be started
with error "No Resource".
Here, add synchronize_irq before suspend to sync the
pending IRQ handlers complete.
Signed-off-by: Bo He <bo.he@...el.com>
Signed-off-by: Yu Wang <yu.y.wang@...el.com>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/usb/dwc3/gadget.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2a4ea9a1b1e3..f51527c8925b 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -3279,6 +3279,8 @@ int dwc3_gadget_suspend(struct dwc3 *dwc)
dwc3_disconnect_gadget(dwc);
__dwc3_gadget_stop(dwc);
+ synchronize_irq(dwc->irq_gadget);
+
return 0;
}
--
2.19.1
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