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authorStefan Roese <sr@denx.de>2016-03-15 13:59:13 +0100
committerMarek Vasut <marex@denx.de>2016-03-20 18:00:44 +0100
commit2ef117fe4fce4e1af282ac2bbb0be36c41d15e2b (patch)
tree76cd1abb0380923ec6217fe10e932875462549cb /common
parentf7f601002d26cd5afc2241728a1e4d6106044184 (diff)
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usb: Remove 200 ms delay in usb_hub_port_connect_change()
This patch removes 2 mdelay(200) calls from usb_hub_port_connect_change(). These delays don't seem to be necessary. At least not in my tests. Here the number for a custom x86 Bay Trail board (not in mainline yet) with a quite large and complex USB hub infrastructure. Without this patch: starting USB... USB0: USB EHCI 1.00 scanning bus 0 for devices... 9 USB Device(s) found time: 28.415 seconds With this patch: starting USB... USB0: USB EHCI 1.00 scanning bus 0 for devices... 9 USB Device(s) found time: 24.003 seconds So ~4.5 seconds of USB scanning time reduction. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Acked-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Stephen Warren <swarren@nvidia.com> Cc: Marek Vasut <marex@denx.de>
Diffstat (limited to 'common')
-rw-r--r--common/usb_hub.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/common/usb_hub.c b/common/usb_hub.c
index 2089e20..d621f50 100644
--- a/common/usb_hub.c
+++ b/common/usb_hub.c
@@ -275,7 +275,6 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port)
if (!(portstatus & USB_PORT_STAT_CONNECTION))
return -ENOTCONN;
}
- mdelay(200);
/* Reset the port */
ret = legacy_hub_port_reset(dev, port, &portstatus);
@@ -285,8 +284,6 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port)
return ret;
}
- mdelay(200);
-
switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
case USB_PORT_STAT_SUPER_SPEED:
speed = USB_SPEED_SUPER;