linux-kernel - [PATCH] usb: dwc3: Softdep for GBit Ethernet on Odroid XU4

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Message-ID: <20190321202303.GA1399@vis>
Date:   Thu, 21 Mar 2019 21:23:03 +0100
From:   Jochen Sprickerhof <git@...hen.sprickerhof.de>
To:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Roger Quadros <rogerq@...com>, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH] usb: dwc3: Softdep for GBit Ethernet on Odroid XU4

This adds a soft dependency to the dwc3 module to load it after
xhci-plat as proposed in:

https://marc.info/?l=linux-usb&m=155230272022603&w=2

Old behaviour:

$ lsusb -t
/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
   |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=r8152, 480M

New behaviour:

$ lsusb -t
/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
   |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=r8152, 5000M

Tested on Debian unstable using Linux 4.19.29.

Note, this needs a hard reset when coming from an unpatched kernel.

Signed-off-by: Jochen Sprickerhof <git@...hen.sprickerhof.de>
---
 drivers/usb/dwc3/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 103807587dc6..9017e4ed9d99 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1746,3 +1746,4 @@ MODULE_ALIAS("platform:dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@...com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
+MODULE_SOFTDEP("pre: xhci_plat_hcd");
-- 
2.11.0


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