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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Ferry Toth <ftoth@exalondelft.nl>
Subject: [PATCH 4.19 374/425] usb: dwc3: pci: Enable usb2-gadget-lpm-disable for Intel Merrifield
Date:   Thu, 20 May 2021 11:22:23 +0200
Message-Id: <20210520092143.688422126@linuxfoundation.org>
In-Reply-To: <20210520092131.308959589@linuxfoundation.org>
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From: Ferry Toth <ftoth@exalondelft.nl>

commit 04357fafea9c7ed34525eb9680c760245c3bb958 upstream.

On Intel Merrifield LPM is causing host to reset port after a timeout.
By disabling LPM entirely this is prevented.

Fixes: 066c09593454 ("usb: dwc3: pci: Enable extcon driver for Intel Merrifield")
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210425150947.5862-1-ftoth@exalondelft.nl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/dwc3-pci.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -133,6 +133,7 @@ static const struct property_entry dwc3_
 	PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
+	PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
 	{}
 };