diff options
| author | Stefan Roese <sr@denx.de> | 2016-03-15 15:59:13 +0300 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2016-03-20 20:00:44 +0300 |
| commit | 2ef117fe4fce4e1af282ac2bbb0be36c41d15e2b (patch) | |
| tree | 76cd1abb0380923ec6217fe10e932875462549cb /common/usb.c | |
| parent | f7f601002d26cd5afc2241728a1e4d6106044184 (diff) | |
| download | u-boot-2ef117fe4fce4e1af282ac2bbb0be36c41d15e2b.tar.xz | |
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/usb.c')
0 files changed, 0 insertions, 0 deletions