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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 11/12] USB: host: detect port change only once in usb_hub_configure_port
Date: Sat, 19 Jul 2014 11:16:06 +0200	[thread overview]
Message-ID: <1405761367-23724-12-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1405761367-23724-1-git-send-email-s.hauer@pengutronix.de>

Otherwise a device may be registered/unregistered multiple times
during scanning the hub ports.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/usb/core/hub.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 144442a..f90a927 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -226,12 +226,14 @@ static void usb_hub_port_connect_change(struct usb_device *dev, int port)
 		dev_dbg(&dev->dev, "hub: disabling port %d\n", port + 1);
 		usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
 	}
+	device_detect(&usb->dev);
 }
 
 static int usb_hub_configure_port(struct usb_device *dev, int port)
 {
 	struct usb_port_status portsts;
 	unsigned short portstatus, portchange;
+	int connect_change = 0;
 
 	if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
 		dev_dbg(&dev->dev, "get_port_status failed\n");
@@ -245,7 +247,7 @@ static int usb_hub_configure_port(struct usb_device *dev, int port)
 
 	if (portchange & USB_PORT_STAT_C_CONNECTION) {
 		dev_dbg(&dev->dev, "port %d connection change\n", port + 1);
-		usb_hub_port_connect_change(dev, port);
+		connect_change = 1;
 	}
 	if (portchange & USB_PORT_STAT_C_ENABLE) {
 		dev_dbg(&dev->dev, "port %d enable change, status %x\n",
@@ -262,9 +264,13 @@ static int usb_hub_configure_port(struct usb_device *dev, int port)
 			dev_dbg(&dev->dev, "already running port %i "  \
 					"disabled by hub (EMI?), " \
 					"re-enabling...\n", port + 1);
-				usb_hub_port_connect_change(dev, port);
+				connect_change = 1;
 		}
 	}
+
+	if (connect_change)
+		usb_hub_port_connect_change(dev, port);
+
 	if (portstatus & USB_PORT_STAT_SUSPEND) {
 		dev_dbg(&dev->dev, "port %d suspend change\n", port + 1);
 		usb_clear_port_feature(dev, port + 1,
-- 
2.0.1


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  parent reply	other threads:[~2014-07-19  9:16 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-19  9:15 USB Host patches Sascha Hauer
2014-07-19  9:15 ` [PATCH 01/12] USB: i.MX chipidea: Implement OTG support for the poor Sascha Hauer
2014-07-19  9:15 ` [PATCH 02/12] commands: usb: add tree view capability Sascha Hauer
2014-07-19  9:15 ` [PATCH 03/12] USB: host: simplify usb_new_device Sascha Hauer
2014-07-19  9:15 ` [PATCH 04/12] USB: host: hub: Turn into a driver Sascha Hauer
2014-07-19  9:16 ` [PATCH 05/12] USB: host: fixup USB device hierarchy Sascha Hauer
2014-07-19  9:16 ` [PATCH 06/12] USB: host: hub: Use dev_dbg Sascha Hauer
2014-07-19  9:16 ` [PATCH 07/12] USB: host: hub: Use usb_hub_power_on from U-Boot Sascha Hauer
2014-07-19  9:16 ` [PATCH 08/12] USB: host: factor out port configuration to separate function Sascha Hauer
2014-07-19  9:16 ` [PATCH 09/12] USB: host: hub: only configure hub once Sascha Hauer
2014-07-19  9:16 ` [PATCH 10/12] USB: host: implement usb_remove_device Sascha Hauer
2014-07-19  9:16 ` Sascha Hauer [this message]
2014-07-19  9:16 ` [PATCH 12/12] USB: host: drop force rescan Sascha Hauer

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