I am a new fish of linux usb host driver developper.
Recently, when developping the host's PM function, I found that usb's
remote wakeup relys on CONFIG_USB_SUSPEND. I do not know why we need
such a restriction.
Is it means if a usb host driver without the implementation of runtime
suspend also ca
Recently, I test my usb host driver(not ehci or any widely used usb
host) with a Ralink's wifi device(use a linux-3.0.39 kernel).
But, if transferring data through FTP for a long time, I found that
usb_hcd_link_urb_to_ep() (It is called by hcd's urb_enqueue function)
returns -EPERM sometimes.
Aft
Hi,
From the ehci-hub.c, I find that ehci_bus_suspend/resume have some
code like this:
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->next_statechange = jiffies + msec_to_jiffies(10);
and
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->ne
Hi,
From the ehci-hub.c, I find that ehci_bus_suspend/resume have some
code like this:
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->next_statechange = jiffies + msec_to_jiffies(10);
and
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->ne
Hi,
When I used mass_storage as a gadget(use a linux-3.0.77 kernel),
After the following operations:
1.Turn my board into hibernation.
2.Plug the usb into host before resume.
3.Resume my board.
I saw some dump message like this, after some digging,
I think the other devices' retore time is too l
Hi,
When I used mass_storage as a gadget(use a linux-3.0.77 kernel),
After the following operations:
1.Turn my board into hibernation.
2.Plug the usb into host before resume.
3.Resume my board.
I saw some dump message like this, after some digging,
I think the other devices' retore time is too l
